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(irbesartan and hydrochlorothiazide)
AVALIDE (irbesartan-hydrochlorothiazide) Tablets are a combination of an angiotensin II receptor antagonist (AT1 subtype), irbesartan, and a thiazide diuretic, hydrochlorothiazide (HCTZ).
Irbesartan is a non-peptide compound, chemically described as a 2-butyl-3-[p-(o-1H-tetrazol-5ylphenyl)benzyl]-1,3-diazaspiro[4.4]non-1-en-4-one. Its empirical formula is C25H28N6O, and its structural formula is:
Irbesartan is a white to off-white crystalline powder with a molecular weight of 428.5. It is a nonpolar compound with a partition coefficient (octanol/water) of 10.1 at pH of 7.4. Irbesartan is slightly soluble in alcohol and methylene chloride and practically insoluble in water.
Hydrochlorothiazide is 6-chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide 1,1dioxide. Its empirical formula is C7H8ClN3O4S2 and its structural formula is:
Hydrochlorothiazide is a white, or practically white, crystalline powder with a molecular weight of 297.7. Hydrochlorothiazide is slightly soluble in water and freely soluble in sodium hydroxide solution.
AVALIDE is available for oral administration in film-coated tablets containing either 150 mg or 300 mg of irbesartan combined with 12.5 mg of hydrochlorothiazide. All dosage strengths contain the following inactive ingredients: lactose monohydrate, microcrystalline cellulose, croscarmellose sodium, hypromellose, magnesium stearate, silicon dioxide, ferric oxide red, ferric oxide yellow, polyethylene glycol, titanium dioxide, and carnauba wax.
What are the possible side effects of hydrochlorothiazide and irbesartan (Avalide)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
In rare cases, hydrochlorothiazide and irbesartan can cause a condition that results in the breakdown of skeletal muscle tissue, leading to kidney failure. Call your doctor right away if you have muscle pain, tenderness, or weakness especially if you also have fever, nausea or vomiting, and dark colored urine.
Call your doctor at once if you have any other serious side effects, such...
What are the precautions when taking irbesartan-hydrochlorothiazide (Avalide)?
Before taking this medication, tell your doctor or pharmacist if you are allergic to irbesartan or hydrochlorothiazide; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: gout, kidney disease, liver disease, lupus, severe loss of body water and minerals (dehydration).
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Severe sweating, diarrhea, or vomiting can increase the risk for lightheadedness or a serious...
Last reviewed on RxList: 11/8/2012
This monograph has been modified to include the generic and brand name in many instances.
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