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Serious side effects may include low blood pressure, kidney problems, allergic reactions, and electrolyte problems. [1] Use in pregnancy and breastfeeding is not recommended. [3] Losartan works by blocking the effects of angiotensin II while hydrochlorothiazide works by decreasing the ability of the kidneys to absorb electrolytes. [1]
Losartan, sold under the brand name Cozaar among others, is a medication used to treat high blood pressure (hypertension). [4] It is in the angiotensin receptor blocker (ARB) family of medication, and is considered protective of the kidneys.
The choice between the drugs is to a large degree determined by the characteristics of the patient being prescribed for, the drugs' side effects, and cost. Most drugs have other uses; sometimes the presence of other symptoms can warrant the use of one particular antihypertensive. Examples include: Age can affect the choice of medications.
For other side effects, data are inconclusive: A study comparing lercanidipine to first-generation drugs found no difference in the frequency of headache and flush, [7] but switching from amlodipine, felodipine or nitrendipine (all at least second generation) to lercanidipine significantly decreased side effects in another study. [5]
Serious side effects may include low blood pressure or heart attack. [10] Whether use is safe during pregnancy or breastfeeding is unclear. [2] [10] When used by people with liver problems, and in elderly individuals, doses should be reduced. [10] Amlodipine works partly by vasodilation (relaxing the arteries and increasing their diameter). [10]
Side effects of these drugs may include but are not limited to: Constipation; Peripheral edema, which can occur in as much as 70% of people receiving calcium channel blocker, is caused by calcium channel blockers' preferential arteriolar or precapillary dilation without commensurate dilation in the venous or postcapillary circulation.
Versions are available as the combination olmesartan/hydrochlorothiazide and olmesartan/amlodipine. [2] It is available as a prodrug, olmesartan medoxomil. Common side effects include dizziness, headaches, diarrhea, and back pain. [2] Serious side effects may include kidney problems, low blood pressure, and angioedema. [2]
It is a combination of telmisartan, an angiotensin II receptor antagonist; and amlodipine, as the besilate, a calcium channel blocker. [3] It is taken by mouth. [3] Common side effects include dizziness, swelling, and back pain. [3] Severe side effects may include low blood pressure, kidney problems, electrolyte problems, and a heart attack. [3]