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Cozaar (Losartan)

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Cozaar is an effective medication which helps to fight with the symptoms of high blood pressure and to reduce the risk of stroke in people with hypertension. It is used in the treatment of kidney problems in people with type 2 diabetes. Cozaar acts by preventing the hormone angiotensin II from constricting the blood vessels, which tends to raise blood pressure.

Other names for this medication:

Similar Products:
Lasix, Norvasc, Toprol, Hyzaar


Also known as:  Losartan.


Cozaar is a perfect remedy, which helps to fight against the symptoms of high blood pressure and to reduce the risk of stroke in people with hypertension.

Its target is to treat kidney problems in people with type 2 diabetes.

Cozaar is also known as Losartan potassium, Cosart, Los-Po.

Cozaar acts by preventing the hormone angiotensin II from constricting the blood vessels, which tends to raise blood pressure. It is angiotensin II receptor antagonists.

Generic name of Cozaar is Losartan Potassium.

Brand name of Cozaar is Cozaar.


Take Cozaar tablets orally with or without food.

Do not crush or chew it.

Take Cozaar once or twice a day at the same time.

If you want to achieve most effective results do not stop taking Cozaar suddenly.


If you overdose Cozaar and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Cozaar overdosage: fainting, feeling lightheaded, rapid heartbeat.


Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) away from moisture, light and heat. Keep container tightly closed. Throw away any unused medicine after the expiration date. Keep out of the reach of children in a container that small children cannot open.

Side effects

The most common side effects associated with Cozaar are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Cozaar if you are allergic to Cozaar components.

Do not take Cozaar if you're pregnant or you plan to have a baby, or you are a nursing mother. Cozaar can harm your baby.

Do not use Cozaar if you are taking salt substitutes or potassium supplements, other blood pressure medicine, diuretic (water pill).

It can be dangerous to use Cozaar if you suffer from or have a history of liver disease, kidney disease, heart failure.

If you want to achieve most effective results without any side effects it is better to avoid alcohol.

Avoid machine driving.

Do not stop taking Cozaar suddenly.

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The patterns of angiotensin II-receptor blocker (ARB) therapy in patients with and without a history of antihypertensive use were studied.

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Losartan is an angiotensin II receptor (AT-II-R) blocker that is widely used by human for blood pressure regulation. Also, it has antitumor property. In this study, we investigated the radiosensitizing effect of losartan on cellular toxicity induced by ionizing radiation on prostate cancer and non-malignant fibroblast cells. Human prostate cancer (DU-145) and human non-malignant fibroblast cells (HFFF2) were treated with losartan at different concentrations (0.5, 1, 10, 50 and 100 µM) and then these cells were exposed to ionizing radiation. The cell proliferation was determined using MTT assay. Our results showed that losartan exhibited antitumor effect on prostate cancer cells; it was reduced cell survival to 66% at concentration 1 µM. Losartan showed an additive killing effect in combination with ionizing radiation on prostate cancer cell. The cell proliferation was reduced to 54% in the prostate cancer cells treated with losartan at concentration 1 µM in combination with ionizing radiation. Losartan did not exhibit any toxicity on HFFF2 cell. This result shows a promising effect of losartan on enhancement of therapeutic effect of ionizing radiation in patients during therapy.

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This protocol has been approved by the CPRD's Independent Scientific Advisory Committee (ISAC). We will publish the results of the study as open-access peer-reviewed publications and disseminate findings through national and international conferences as are appropriate.

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Using Ang II I radioimmunoassay, real-time reverse transcription-PCR and western blot, we found that Ang II levels, and mRNA and protein expression of angiotension II type 1 receptor in nodose ganglia from CHF rats were higher than that from sham rats. Local microinjection of Ang II (0.2  nmol) into the nodose ganglia decreased the arterial baroreflex sensitivity in sham rats, whereas losartan (1  nmol, an angiotension II type 1 receptor antagonist) improved the arterial baroreflex sensitivity in CHF rats. Data from patch-clamp recording showed that Ang II (100  nmol/l) acutely inhibited Nav currents in the aortic baroreceptor neurons from sham and CHF rats. In particular, inhibitory effect of Ang II on Nav currents in the aortic baroreceptor neurons was larger in CHF rats than that in sham rats. Losartan (1  μmol/l) totally abolished the inhibitory effect of Ang II on Nav currents in sham and CHF aortic baroreceptor neurons.

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Fifteen patients aged 43.3 +/- 11.3 years with primary glomerulonephritis confirmed by renal biopsy were studied.

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RT-PCR revealed two times higher prepro-TRH expression in left auricle than left ventricle. In transgenic rats with extra copy of mouse renin gene a marked increase of prepro-TRH expression in the heart was noted but the relative difference between left atrium and left ventricle persisted. The swelling stimulated TRH release from both left auricle and left ventricle and this stimulation could not be inhibited by bumetanide. Angiotensin II (10 nmol L-1) added into medium significantly decreased basal secretion of TRH. The inhibiting effect of Angiotensin II was prevented by 1 micromol L-1 losartan, an angiotensin II AT1 receptor blocker. When angiotensin II and hypotonicity were applied simultaneously, swelling-induced secretion persisted.

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The renin-angiotensin system may be implicated in the subtle sodium handling abnormality in preascitic cirrhosis.

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In the normal condition, AT2R in the IML tonically inhibits sympathetic activity through an NO/NOS dependent pathway and subsequent potassium channel activation.

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ANG-(1-7) significantly attenuates ANGII-induced vasoconstriction and, although the Mas receptor is expressed in HMA, this effect seems to be independent of its activation. Additionally, AT2 receptor and endothelium are not involved in this mechanism, which suggests a direct effect on smooth muscle cells.

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We investigate whether combined treatment with losartan, an angiotensin II receptor blocker, and exercise training (ET) in spontaneously hypertensive rats (SHR) would have an additive effect in reducing hypertension and improving baroreflex sensitivity when compared with losartan alone. Male SHR (8 weeks old) were assigned to 3 groups: sedentary placebo (SP, N = 16), sedentary under losartan treatment (SL, N = 11; 10 mg kg-1 day-1, by gavage), and ET under losartan treatment (TL, N = 10). ET was performed on a treadmill 5 days/week for 60 min at 50% of peak VO2, for 18 weeks. Blood pressure (BP) was measured with a catheter inserted into the carotid artery, and cardiac output with a microprobe placed around the ascending aorta. The baroreflex control of heart rate was assessed by administering increasing doses of phenylephrine and sodium nitroprusside (iv). Losartan significantly reduced mean BP (178 16 vs 132 12 mmHg) and left ventricular hypertrophy (2.9 0.4 vs 2.5 0.2 mg/g), and significantly increased baroreflex bradycardia and tachycardia sensitivity (1.0 0.3 vs 1.7 0.5 and 2.0 0.7 vs 3.2 1.7 bpm/mmHg, respectively) in SL compared with SP. However, losartan combined with ET had no additional effect on BP, baroreflex sensitivity or left ventricular hypertrophy when compared with losartan alone. In conclusion, losartan attenuates hypertension and improves baroreflex sensitivity in SHR. However, ET has no synergistic effect on BP in established hypertension when combined with losartan, at least at the dosage used in this investigation.

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The LIFE study (Losartan Intervention For Endpoint reduction in hypertension) is a randomized, double-blind comparison of losartan and atenolol-based treatment. The study hypothesis was that losartan would reduce cardiovascular morbidity and mortality more than traditional antihypertensive treatment with atenolol.

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The present investigation determined that native angiotensins II and III (ANG II and III) were equipotent as pressor agents when ICV infused in alert rats, whereas native angiotensin IV (ANG IV) was less potent. An analogue of each of these angiotensins was prepared with a hydroxyethylamine (HEA) amide bond replacement at the N-terminus, yielding additional resistance to degradation. These three angiotensin analogues, HEA-ANG II, HEA-ANG III, and HEA-ANG IV, were equivalent with respect to maximum elevation in pressor responses when ICV infused; and each evidenced significantly extended durations of effect compared with their respective native angiotensin. Comparing analogues, HEA-ANG II had a significantly longer effect compared with HEA-ANG III, and HEA-ANG IV, whereas the latter were equivalent. Pretreatment with the AT1 receptor subtype antagonist, Losartan (DuP753), blocked subsequent pressor responses to each of these analogues, suggesting that these responses were mediated by the AT1 receptor subtype. Pretreatment with the specific AT4 receptor subtype antagonist, Divalinal (HED 1291), failed to influence pressor responses induced by the subsequent infusion of these analogues. These results suggest an important role for Ang III, and perhaps ANG IV, in brain angiotensin pressor responses mediated by the AT1 receptor subtype.

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Based on antihypertensive efficacy data versus irbesartan, the use of olmesartan medoxomil is expected to reduce the number of new cases of CV disease, resulting in a first-year reduction in cost in a cohort of 100,000 patients of 906,000 US dollars. Similarly, a reduction in new cases of coronary heart disease (CHD) resulted in a cost reduction of 701,000 US dollars; a cost reduction of 196,000 US dollars for fewer myocardial infarctions (MI); and a cost reduction of 28,000 US dollars for fewer strokes. Over 5 years, these estimates increase to 5,410,000 US dollars for fewer cases of CV disease; 3,975,000 US dollars for fewer cases of CHD; 1,430,000 US dollars for fewer MI; and 497,000 US dollars for fewer strokes. Compared with valsartan, the use of olmesartan medoxomil is estimated to reduce by 3,397,000 US dollars the expected cost of treating a cohort of 100 000 patients in the first year for fewer cases of CV disease; by 2,426,000 US dollars for fewer cases of CHD; by 565,000 US dollars for fewer MI; and by 124,000 US dollars for fewer strokes. Over 5 years, these estimates increase to 16,231,000 US dollars for CV disease; 11,955,000 US dollars for CHD; 4,505,000 US dollars for MI; and 1,741,000 dollars for stroke. Compared with losartan, the estimated reduction in first-year cost is 2,969,000 US dollars for CV disease for the cohort of 100,000 patients; 2,163,000 US dollars for CHD; 732,000 US dollars for MI; and 124,000 US dollars for stroke. Over 5 years, these estimates increase to 15,149,000 US dollars for CV disease; 11,107,000 US dollars for CHD; 4,057,000 US dollars for MI; and 1,437,000 dollars for stroke.

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There are two major isoforms of the angiotensin II receptor, type 1 (AT1) and type 2 (AT2). AT2 is distinguished from AT1 with respect to its ligand selectivity, its insensitivity to non-hydrolyzable GTP analogues, and its as yet unidentified biological functions. In the present study we have expression-cloned AT2 cDNA from a cDNA library of a rat pheochromocytoma cell line (PC12w). Rat AT2 cDNA encodes a 363-amino acid protein that has seven transmembrane domains. AT1 is the closest in homology to AT2 but with only a 32% identity of amino acid sequence. Stably expressed in COS-7 cells, the receptor showed selective binding to AT2-specific ligands PD123319 and CGP42112A but not to the AT1-specific ligand, losartan. Northern blot analysis revealed that the mRNA of rat AT2 was expressed not only in PC12w cells but also in the adrenal glands and in the inferior olive of the brain, both of which are known to contain AT2 type binding sites. The expressed AT2 receptor mediated angiotensin II-induced inhibition of protein tyrosine phosphatase, an action that was dependent on a pertussis toxin-sensitive G-protein-coupled mechanism in COS-7 cells. The AT2-specific ligand CGP42112A was an agonist rather than antagonist in the inhibition of phosphotyrosine phosphatase. AT2 did not cause a decrease in cGMP in PC12w or COS-7 cells expressing AT2 stably. These results indicate that the AT2 receptor is structurally and functionally different from AT1 and suggest novel functional roles of the renin-angiotensin system in cross-talk with phosphotyrosine signaling by modulating protein phosphotyrosine levels.

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There were significant differences in the levels of CD62P, CD63, PAC-1, platelet microparticles, endothelial microparticles, sE-selectin, and sVCAM-1 between the hypertensive patients and healthy controls. These markers were all significantly increased in hypertensive and hyperlipidemic patients with Type 2 diabetes. In hypertensive patients with diabetes, CD62P, CD63, PAC-1, platelet and endothelial microparticles, and soluble adhesion markers were all decreased by losartan monotherapy. The decrease of each marker in hypertensive and hyperlipidemic patients given combined therapy with losartan plus simvastatin was greater among those with than without Type 2 diabetes. Low-density lipoprotein was decreased significantly by simvastatin and was correlated with CD62P or platelet microparticles in all of the patients.

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Diurnal blood pressure was significantly reduced after losartan compared with placebo (122/70 +/- 11/8 vs. 130/76 +/- 12/6 mmHg, p < 0.05). A significant decline in GFR (133 +/- 23 vs. 140 +/- 22 ml/min, p < 0.05) and filtration fraction (FF; GFR/RPF) (24.6 +/- 3.5 vs. 26.2 +/- 3.6%, p < 0.05) was observed in the losartan vs. placebo groups. RPF and UAE did not change. Isotopically determined glucose disposal rates were similar after losartan and placebo in the basal (2.61 +/- 0.53 vs. 2.98 +/- 0.93 mg/kg/min) and insulin-stimulated states (6.84 +/- 2.52 vs. 6.97 +/- 3.11 mg/kg/min). However, the glucose oxidation rate increased significantly after losartan vs. placebo in the basal state (1.72 +/- 0.34 vs. 1.33 +/- 0.18, mg/kg/min, p < 0.01) and during insulin stimulation (2.89 +/- 0.75 vs. 2.40 +/- 0.62 mg/kg/min, p < 0.03). Basal and insulin-stimulated non-oxidative glucose disposal tended to decrease after losartan; however, this was not significant. Endogenous glucose production and lipid oxidation were unchanged after treatment and similarly suppressed during hyperinsulinaemia. Glycaemic control, total cholesterol, high-density lipoprotein (HDL)-cholesterol and triglycerides were stable in both losartan and placebo groups.

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Urinary kallikrein excretion is positively correlated to renal function, serum and urinary inflammatory mediator MCP-1 in chronic kidney disease patients. These findings indicate that urinary kallikrein excretion may reflect the change of renal function and kidney inflammatory status.

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The serum EDLS levels increased significantly compared with a CSF group after SFO administration with Ang II; The Na+, K(+)-ATPase activities in PT segments decreased significantly at 30 min and 60 min after SFO administration with Ang II. There was a negative linear correlation between serum EDLS level and the Na+, K(+)-ATPase activity of PT segments in rats administrated with Ang II (r = -0.938).

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Although transient spironolactone treatment leads to prolonged blood pressure reduction and reduced collagen deposition, long-term organ protection only partially exists. Thus, transient spironolactone treatment is less effective than transient losartan treatment.

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Diabetic rats demonstrated baseline increases in GFR and FF. In contrast to similar decreases in BP in diabetic and control rats, renal vasodilator effects and a decrease in FF, following ROCK inhibition were observed only in diabetic rats. The vasodilator effects of Y27632 and a further decrease in FF, were also detected in diabetic rats pretreated with the angiotensin antagonist losartan. The effects of ROCK inhibitors in diabetic rats were modulated by prior protein kinase C (PKC)β inhibition with ruboxistaurin, which abolished their effects on FF. Consistent with the renal vasodilator effects, the ROCK inhibitors reduced phosphorylation of myosin light chain in diabetic kidneys.

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The study is to investigate the effect of angiotensin II (Ang II) and its receptor blockers on migration and endothelin-1 (ET-1) expression of rat vascular adventitial fibroblast subpopulations. Vascular adventitial fibroblasts were individually expanded by using cloning rings, and the effects of Ang II on the migration of adventitial fibroblast subpopulations were evaluated by Transwell. Fluorescence quantitative-PCR detected the expression of preproET-1 mRNA induced by Ang II, and its receptor antagonists losartan and PD-123319. The concentration of ET-1 was determined by ELISA. It showed that spindle shaped and epithelioid shaped cells were isolated by using cloning rings, named as spindle cells and round cells. RT-PCR showed that fibroblast subpopulations did not have leukocytes, endothelial cells and smooth muscle cells, namely pure cell lines. Compared with respective control cells, two subpopulations had transferring ability. Ang II significantly improved round cells migration in a concentration-dependent manner, and had no obvious influence on spindle cells migration. Ang II (1 x 10(-8) - 1 x 10(-6) mol x L(-1)) significantly increased the expression of preproET-1 mRNA in round cells (P < 0.01), and had no significant effect on the expression of preproET-1 mRNA in spindle cells. Losartan blocked the expression of preproET-1 mRNA induced by Ang II in round cells, and had no significant effect on the expression of preproET-1 mRNA in spindle cells. The effects of Ang II and ET-1 receptor inhibitors on the release of ET-1 were similar to the expression of preproET-1 mRNA. The results indicate that there are two cell subpopulations: round cells and spindle cells in rat vascular adventitial fibroblasts. Ang II significantly improved cells migration, and increased the expression of ET-1 in round cell subpopulation. It suggested that there may be different migratory mechanisms in two cell subpopulations, and the two subpopulations may play a different role in vascular remodeling and reparative process.

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Actions of ANG II on electrical and synaptic behavior of enteric neurons in the guinea pig small intestine were studied. Exposure to ANG II depolarized the membrane potential and elevated neuronal excitability. The number of responding neurons was small, with responses to ANG II in 32% of submucosal neurons and 25% of myenteric neurons. Hyperpolarizing responses were evoked by ANG II in 45% of the neurons. The hyperpolarizing responses were suppressed by alpha2-noradrenergic receptor antagonists, which suggested that the hyperpolarizing responses reflected stimulation of norepinephrine release from sympathetic neurons. Exposure to ANG II enhanced the amplitude and prolonged the duration of noradrenergic inhibitory postsynaptic potentials and suppressed the amplitude of both fast and slow excitatory postsynaptic potentials. The selective ANG II(1) receptor (AT1R) antagonists, ZD-7115 and losartan, but not a selective AT2R antagonist (PD-123319), suppressed the actions of ANG II. Western blot analysis and RT-PCR confirmed expression of AT1R protein and the mRNA transcript for the AT1R in the enteric nervous system. No expression of AT2R protein or mRNA was found. Immunoreactivity for AT1R was expressed by the majority of neurons in the gastric antrum and small and large intestine. AT1R immunoreactivity was coexpressed with calbindin, choline acetyltransferase, calretinin, neuropeptide Y, and nitric oxide synthase in subpopulations of neurons. The results suggest that formation of ANG II might have paracrine-like actions in the enteric nervous system, which include alterations in neuronal excitability and facilitated release of norepinephrine from sympathetic postganglionic axons. The enhanced presence of norepinephrine is expected to suppress fast and slow excitatory neurotransmission in the enteric microcircuits and to suppress neurogenic mucosal secretion.

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Asia is predicted to have the largest population of patients with diabetes who are at high risk for renal disease. In the Reduction of Endpoints in NIDDM with the Angiotensin II Antagonist Losartan (RENAAL) study, approximately 17% of patients were Asians. In this subgroup analysis, we examined the characteristics, response, and adherence to treatment of the Asian population, as well as their baseline predictors of risk of renal end points.

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Using radioligand binding studies, we have defined the angiotensin II receptors present on these cells as being predominantly of the AT1 subtype. Angiotensin II increased peak intracellular calcium levels by 126 +/- 16 nmol/l (mean +/- SEM) in 17/49 cultures. Angiotensin II induced c-fos expression in a concentration-dependent manner only in cultures that exhibited an intracellular calcium transient in response to stimulation with angiotensin II. The induction of c-fos was inhibited by the selective AT1 antagonist losartan in accordance with the binding studies. Angiotensin II stimulated DNA synthesis with a maximal increase of 66.4% +/- 20.5% over serum-free levels at 1 nmol/l (mean +/- SEM, n = 6, P < 0.05). DNA synthesis declined with increasing angiotensin II concentration, falling to control values at 1 mumol/l, suggesting that a growth-inhibitory influence may counter-balance the stimulatory effect that is observed at lower concentrations.

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In cultured RPMCs, Ang II upregulated profibrotic signaling pathways through AT1-mediated ERK1/2 phosphorylation.

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We tested the hypothesis that the combination of converting enzyme inhibitor (CEI) with losartan (LOS) produces a more profound antiproteinuric effect than either drug alone in normotensive patients with immunoglobulin A (IgA) nephropathy. Eight normotensive (mean blood pressure, 88.9 +/- 2.1 mm Hg) patients with biopsy-proven IgA nephropathy, nonnephrotic proteinuria (protein, 1 to 3 g/d), and normal or slightly reduced creatinine clearance (range, 69 to 119 mL/min) were studied. Clinical evaluations and laboratory tests were performed (1) before CEI treatment (basal) and after (2) CEI alone (CEI, 12 weeks); (3) the combination of CEI and LOS, the latter at a dosage of 50 mg/d (CEI + LOS, 4 weeks); (4) LOS alone (LOS; 50 mg/d; 12 weeks); (5) the combination of LOS and CEI (LOS + CEI, 4 weeks, at the same dosage as CEI + LOS); and (6) a doubled dose of either CEI alone or LOS alone for 4 weeks. CEI and LOS as monotherapy significantly reduced proteinuria by 38% and 30%, respectively. No further reduction of proteinuria was achieved by doubling the dose of CEI or LOS. Both combinations induced a more remarkable reduction of proteinuria (73%; P < 0.05 v other periods) than either drug administered alone. The antiproteinuric effect of CEI or LOS and the more remarkable effect achieved with both combinations was not dependent on the reduction of blood pressure and/or creatinine clearance. In conclusion, this study provides first-time evidence that the combination of CEI and LOS in normotensive patients with IgA nephropathy produces a more profound decrease in proteinuria than either drug. This additive antiproteinuric effect is not dependent on changes in systemic blood pressure and creatinine clearance. Nevertheless, a larger controlled study is required to confirm this novel observation.

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The results suggest that the cognitive enhancing effect of ACEI and ARBs may be due to inhibition of AChE or by regulation of antioxidant system or increase in formation of angiotensin IV.

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cozaar tabs 100mg 2016-08-30

Lower achieved SBP (<144 mm Hg) is associated with a significantly increased risk of cardiovascular and all-cause mortality after initial stroke in hypertensive patients during short-term follow-up. Further study is required to determine ideal buy cozaar SBP goals after stroke.

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Pretreatment of HAECs with rosiglitazone prior to Ang II stimulation markedly downregulated Ang II-induced mRNA and protein expressions of CRP (maximal inhibition of 55.2 and 99 buy cozaar .1 %, P < 0.001 vs. Ang II alone) and AT(1) (maximal inhibition of 66.4 and 90.5 %, P < 0.001 vs. Ang II alone) in a concentration-dependent manner, inhibited Ang II-stimulated ROS production (P < 0.01 vs. Ang II alone), and attenuated Ang II-induced phosphorylation of ERK1/2 and JNK (P < 0.001 vs. Ang II alone). Meanwhile, AT(1) receptor blocker losartan also reduced Ang II-stimulated ROS generation in HAECs (P < 0.001 vs. Ang II alone).

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Depression has been associated to inflammatory and oxidative events. Previous report has shown renal oxidative stress in patients with depression. In order to analyze if depressive status is related to renal oxidative and inflammatory events, Sprague Dawley rats were submitted to forced swimming test (FST) and the renal oxidative metabolism, monocyte-macrophage infiltration and Angiotensin II (Ang II) expression were determined. Rats were submitted to FST daily (30 min) for 15 days. Motor activity was analyzed before FST. Kidney sections were homogenized to measure nitric oxide (NO), malondialdehyde (MDA), reduced glutathione (GSH) and catalase activity by enzymatic and biochemical methods. Renal frozen sections were studied for superoxide anion (O2-), monocyte/macrophage infiltration and Ang II expression by histochemical and immunofluorescence methods. In addition, three groups of FST rats were treated with losartan, sertraline or water for 18 days with further renal O2-analysis. In the FST group, struggle time, motor activity, food intake and body weight gain were found decreased. Increased number of glomerular, interstitial and buy cozaar tubular O2-positive cells was observed in FST rats. High renal content of nitrite/nitrate (NO), MDA and decreased amount of GSH were found in FST rats. Values of renal ED-1 or Ang II positive cells in FST rats remained similar to controls; however, AT1 receptor blocking (losartan) and sertraline reduced both depressive-like behavior and renal O2-expression. These data suggests that depression-like behavior in rats is involved in kidney oxidative stress probably mediated by AT1 receptors.

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A decision-analytic model was developed to estimate costs and health buy cozaar outcomes over a patient's lifetime. Data from a clinical registry study were used to estimate event rates for cardiovascular complications, such as myocardial infarction and heart failure. Costs and quality of life data were from published sources. Costs were in Swedish kronor and the outcome was quality-adjusted life-years (QALYs).

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The high prevalence of this illness and the side effects of antihypertensive drugs conducted us to the evaluation of the Salvia elegans extract on buy cozaar angiotensin II action.

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We examined the role of the central nervous system, and particularly the renin-angiotensin (RA) system, in the development of hypertension produced by chronic inhibition of NO synthesis. In experiment 1, Wistar rats drank either nitro-L-arginine-methyl ester (L-NAME) or tap water. Before L-NAME treatment rats were divided into 6 groups. Four of them were administered either losartan or artificial cerebroventricular fluid (a-CSF) intracerebroventricularly (i.c.v.) for 1 week using an osmotic mini pump. The other two groups were administered the same amount of losartan intravenously (i.v.). In experiment 2, cardiovascular responses to acute i.c.v. losartan and muscimol, a GABA(A) agonist, were examined in conscious L-NAME-treated rats. Finally, in experiment 3, effects buy cozaar of ablation of the AV3V (anteroventral third ventricle) area, known to be one of the centers of cardiovascular control, were tested in the development of L-NAME hypertension. The development of hypertension by L-NAME treatment was attenuated with chronic i.c.v. losartan in a dose-dependent manner, while i.v. losartan had no effect. One week after cessation of i.c.v. losartan, blood pressure was elevated to the same level as in a-CSF-infused, L-NAME-treated rats. Acute i.c.v. losartan produced no cardiovascular changes in either L-NAME-treated or control rats. On the other hand, although i.c.v. muscimol elicited depressor effects in both groups, these responses were significantly larger in L-NAME-treated rats. Cardiovascular responses to i.v. hexamethonium were similar in both groups. The existence of prior lesions in the AV3V area significantly attenuated the development of L-NAME-induced hypertension. These results indicate that the central RA system plays an important role in the development of hypertension produced by chronic inhibition of NO synthase. Moreover, disorder of the central GABA system, rather than that of the RA system, might be important in the maintenance of hypertension in this model.

cozaar y alcohol 2015-12-09

Compared with the control group, the low- and high-dose losartan groups showed significant decreases in systolic blood pressure ([203.75 +/- 10.28] vs [184.54 +/- 16.90] mmHg, P = 0.013; [203.75 +/- 10.28] vs [166.88 +/- 14.74] mmHg, P = 0.001) and diastolic blood pressure ([151.58 +/- 9.96] vs [136.71 +/- 14.28] mmHg, P = 0.022; [151.58 +/- 9.96] vs [122.71 +/- 11.56] mmHg, P < 0.001) of the lower tail artery after treatment, as well as in the prostate weight ([0.73 +/- 0.08] vs [0.64 +/- 0.10] mg, P = 0.011; [0.73 +/- 0.08 ] vs [0.50 +/- 0.17] mg, P < 0.001). Electron microscopy revealed edema of the basal and columnar epithelial cells, concentrated and marginated heterochromatin and widened nuclear gap of interstitial fibroblast nuclei, and reduced mitochondria and endoplasmic reticula in the low-dose losartan group, and even more obvious in the high-dose group. The level of serum Ang II was remarkably higher in the low- and high-dose losartan groups than in the control ([61.32 +/- 2.49] vs [54.85 +/- 7.20] pg/ml, P = 0.021; [65.49 +/- 6.78] vs [54.85 +/- 7.20] pg/ml, P < 0.001]) , that of serum IGF-1 was lower in high-dose losartan than in the control group ([1.50 +/- 0.11] vs [1.60 +/- 0.10] ng/ buy cozaar ml, P = 0.03), but the serum IL-6 levels exhibited no significant differences among the three groups. The expression of eNOS in the prostate tissue was significantly higher in the losartan groups than in the controls (P = 0.022), even higher in the high-dose than in the low-dose group.

cozaar max dose 2017-01-30

To distinguish the contributions of Ren1(d) and Ren2 to kidney development and blood pressure homeostasis, we placed green fluorescent protein (GFP) under control of the Ren1(d) renin locus by homologous recombination in mice. Homozygous Ren1(d)-GFP buy cozaar animals make GFP mRNA in place of Ren1(d) mRNA in the kidney and maintain Ren2 synthesis in the juxtaglomerular (JG) cells. GFP expression provides an accurate marker of Ren1(d) expression during development. Kidneys from homozygous animals are histologically normal, although with fewer secretory granules in the JG cells. Blood pressure and circulating renin are reduced in Ren1(d)-GFP homozygotes. Acute administration of losartan decreases blood pressure further, suggesting a role for Ren2 protein in blood pressure homeostasis. These studies demonstrate that, in the absence of Ren1(d), Ren2 preserves normal kidney development and prevents severe hypotension. Chronic losartan treatment results in compensation via recruitment of both Ren1(d)- and Ren2-expressing cells along the preglomerular vessels. This response is achieved by metaplastic transformation of arteriolar smooth muscle cells, a major mechanism to control renin bioavailability and blood pressure homeostasis.

cozaar drug interactions 2016-01-31

Angiotensin II recognizes two receptor subtypes, AT1 and AT2, both of them having been recently cloned. Although AT2 receptors represent 5-10% of angiotensin II receptors in the kidneys of adult rats, their function remains unknown. In the present work, we examined the possible contribution of AT2 receptors to the regulation of pressure-natriuresis in anesthetized rats infused either with the specific AT2 antagonist PD 123319, or with CGP 42112B, an AT2 ligand with agonistic properties. The effects of PD 123319 were examined in a preparation with stable levels of angiotensin II, and in which AT1 receptors were blocked by the specific antagonist losartan. The effects of CGP 42112B were studied in rats deprived of endogenous angiotensin II. AT2 receptor blockade with PD 123319 did not change the renal blood flow while it increased the diuresis and natriuresis. These effects persisted even after full AT1 receptor blockade with losarfan. CGP 42112B did not modify the renal blood flow, but dose-dependently decreased urine flow and natriuresis. These results show that, contrary to AT1 receptors, renal AT2 receptors have no effect on total renal blood flow, but blunt the pressure-natriuresis, thus demonstrating that this receptor subtype is involved in a function of importance for body fluid and blood buy cozaar pressure regulation.

cozaar water pill 2016-07-14

To observe the reconstruction features of adventitia in senescent rats, and to explore the intervention mechanism of Chinese herbs (CH, extracts from Radix Ginseng, buy cozaar Radix Notoginseng, and Rhizoma Chuanxiong).

normal cozaar dose 2017-05-06

The impairing effect in the IA response of post-training acute amphetamine was partially prevented by Losartan. The long-term changes induced by repeated amphetamine (resistance to acute amphetamine interference in the IA buy cozaar response, neurochemical altered response, and increased hippocampal synaptic transmission) were prevented by AT1-receptors blockade.

cozaar generic brands 2017-11-14

At the end of the study, mean aortic pressure in dogs had decreased by 14% in experiment I (from 139 +/- 4.7 to 119 +/- 4.7 mmHg, P<0.05), whereas a 28% reduction occurred in experiment II (from 145 +/- 8.9 to 104 +/- 5.0 mmHg, P<0.005), corresponding to an additional 14% decrease after administration of bosentan (P<0.005 between groups). This cumulative effect of bosentan was related to a decrease in systemic vascular resistance (from 1220 +/- 119 to 847 +/- 189 mmHg/ml per min per kg buy cozaar x 10(3), P<0.05). Plasma angiotensin II level increased similarly in both experiments (in experiment I from 133 +/- 43 to 622 +/- 145 pg/ml, P=0.01; in experiment II from 198 +/- 63 to 771 +/- 134 pg/ml, P<0.005) whereas plasma endothelin-1 level increased only in experiment II (from 3.8 +/- 0.4 to 32.7 +/- 3.2 pg/ml, P<0.001).

cozaar 40 mg 2016-09-30

Losartan is an orally active angiotensin II receptor antagonist indicated for the treatment of hypertension. EXP3174 is an active metabolite, which contributes to the overall activity of losartan. Analytical methods for the simultaneous determination of losartan and its active metabolite EXP3174 in human plasma and urine with limited plasma sample size have been developed and validated to support a pediatric clinical program. In both methods, analytes are extracted from the matrixes by liquid-liquid extraction and separated using reverse phase high-performance liquid chromatography (HPLC). A tandem mass spectrometer (MS/MS) with a Turbo ionspray (TIS) interface in multiple-reaction-monitoring (MRM) mode is used for detection of the analytes in Minipress Ptsd Dosage both methods. The plasma method has a lower limit of quantitation (LOQ) of 1 ng/ml with a linearity range of 1-500 ng/ml for losartan and EXP3174 using 100 microl of plasma. For the urine method, the LOQ for both losartan and EXP3174 is 2 ng/ml using 0.5 ml of urine, and the linearity range for both analytes is 2-1000 ng/ml. Validation procedures have proven that both methods are robust, accurate, and reproducible. Both methods have been used to assay clinical samples and provided satisfactory results.

cozaar 30 mg 2017-08-15

This report describes DeBakey Type I aortic dissection in a middle-aged hypertensive female who had undergone mitral tissue valve replacement a decade previously. The patient had severe abrupt onset tearing pain in her throat, back, and chest, for which she got admitted in a community hospital, where because of no changes in her ECG and biomarkers, the dissection of aorta was missed. She was subjected to coronary angiography more than 6 weeks later for pain in her left shoulder, which demonstrated normal vessels. She then underwent multi-detector computerised tomography aortogram (MD CTA) that revealed aortic dissection involving ascending, the arch, and descending thoracic and abdominal aorta. The patient declined surgical intervention and has been provided medical therapy in the form of high dose oral beta-blocker and losartan. The patient continues to be stable for the Amoxil Suspension Glaxosmithkline past 18 weeks since the index event. The report highlights the importance of detecting aortic dissection by keeping high index of clinical suspicion in a patient with abrupt onset tearing pain in the throat/back and employment of MD CTA.

cozaar 50mg tablets 2015-09-04

The effects of chronic treatment with losartan. an AT1 receptor antagonist, on the tissue content of bradykinin (BK) and des-Arg9-BK and on their pharmacological effects were examined in the carrageenan-induced paw edema model (0.5% solution, 50 microl/paw) in the rat. These effects were compared with those of angiotensin-converting enzyme inhibitors (ACEi). For this purpose, rats were chronically treated with losartan (3, 10 and 30 mg/kg/day) and enalapril or quinapril (1 mg/kg/day). Endogenous BK and des-Arg9-BK tissue contents at the site of local inflammation were measured by highly sensitive and specific enzyme immunoassays. Losartan 3 mg/kg/day for 7, 14 and 28 days had no significant effect on carrageenan-induced paw edema, but both losartan 10 and 30 mg/kg/day for 14 days significantly increased the hindpaw volume by 50% at 3 h and by 59% at 5 h. These effects, similar to those measured for ACEi, were inhibited by icatibant, a B2 kinin receptor antagonist (32.5 nmol/paw), that reduced carrageenan-induced paw edema to the level seen in vehicle-treated rats. In the same model, and contrary to ACEi, losartan 3, 10 and 30 mg/kg/day for 14 days had no significant effect on endogenous BK and des-Arg9-BK levels in the local inflammatory site or on circulating and tissue ACE activities. These results show, at least in that model, that the potentiating effects of losartan on Propecia Buy Online carrageenan-induced paw edema are independent of the concentrations of endogenous kinins.

cozaar 80 mg 2015-02-28

Angiotensin II is known to regulate motility and ion and water absorption in the intestine. These effects are presumed to be mediated by angiotensin II (ANG II) receptors that are present in both mucosal and muscular layers throughout the intestine. To evaluate tissue density and distribution of ANG II receptor subtypes (AT1 and AT2), we performed an in situ autoradiographic study on jejunum, ileum, and colon of Sprague-Dawley rats. Tissue sections (10 microns) were incubated with 500 pM 125I-[Sar1,Ile8]ANG II, fixed with paraformaldehyde vapors, and coated with photographic emulsion. Binding specificity was verified by competition with unlabeled [Sar1]ANG II (10 microM). AT1 and AT2 receptor distribution was characterized by competition with the nonpeptide antagonists losartan (10 microM) and PD123177 (10 microM), respectively, and the density of receptors was quantified by counting the silver grains overlying the different layers of intestinal wall. Specific binding was moderately abundant in the mucosa and the muscularis of both jejunum and ileum, whereas no binding was present in the submucosa and the serosa. Losartan inhibited 86% of radioligand binding to the mucosa in both jejunum and ileum, whereas PD123177 inhibited only 10%. The combination of the two compounds inhibited 96% of specific binding. In the colon, binding was significantly more abundant in the muscularis Diamox Reviews than in the mucosa. In this segment, losartan inhibited 90% and PD123177 16% of specific binding to muscularis. The combination of these compounds reduced binding by 97%. Thus the predominant ANG II receptor in all intestinal segments is AT1, but a small population of AT2 receptors also seems to be present.(ABSTRACT TRUNCATED AT 250 WORDS)

cozaar 25mg medication 2017-03-21

Despite the mean metabolic ratio being Propecia 1mg Tablets higher in this population than in others previously studied across genotypes, no poor metabolizers, either phenotypically or genotypically, were found.

cozaar generic 2015-06-21

The influence of alpha2-autoreceptors on the facilitation of [3H]-noradrenaline release mediated by angiotensin II was studied in prostatic portions of rat vas deferens preincubated with [3H]-noradrenaline. Angiotensin II enhanced tritium overflow evoked by trains of 100 pulses at 8 Hz, an effect that was attenuated by the AT1-receptor antagonist losartan (0.3-1 microM), at concentrations suggesting the involvement of the AT1B subtype. The effect of angiotensin II was also attenuated by inhibition of phospholipase C (PLC) and protein kinase C (PKC) indicating that prejunctional AT1-receptors are coupled to the PLC-PKC pathway. Angiotensin II (0.3-100 nM) enhanced tritium overflow more markedly, up to 64%, under conditions that favor alpha2-autoinhibition, observed when stimulation consisted of 100 pulses at 8 Hz, than under poor alpha2-autoinhibition conditions, only up to 14%, observed when alpha2-adrenoceptors were blocked with yohimbine (1 microM) or when stimulation consisted of 20 pulses at 50 Hz. Activation of PKC with 12-myristate 13-acetate (PMA, 0.1-3 microM) also enhanced tritium overflow more markedly under strong alpha2-autoinhibition conditions. Inhibition of Gi/o-proteins with pertussis toxin (8 microg/ml) or blockade of Gbetagamma subunits with the anti-betagamma peptide MPS-Phos (30 microM) attenuated the effects Geodon Buy of angiotensin II and PMA. The results indicate that activation of AT1-receptors coupled to the PLC-PKC pathway enhances noradrenaline release, an effect that is markedly favoured by an ongoing activation of alpha2-autoreceptors. Interaction between alpha2-adrenoceptors and AT1-receptors seems to involve the betagamma subunits released from the Gi/o-proteins coupled to alpha2-adrenoceptors and protein kinase C activated by AT1-receptors.

cozaar generic equivalent 2017-04-07

The term "receptor-associated prorenin system" (RAPS) refers to the pathogenic mechanisms whereby prorenin binding to its receptor Flagyl Medication Class dually activates the tissue renin-angiotensin system (RAS) and RAS-independent intracellular signaling via the receptor. The aim of the present study was to define the association of the RAPS with diabetes-induced retinal inflammation.

cozaar low dose 2017-04-09

To elucidate the effect of angiotensin II (AngII) on Paxil Oral Suspension the expression of tissue factor (TF) by monocytes and its mechanisms.