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The active ingredient in ACIPHEX Delayed-Release Tablets is rabeprazole sodium, a substituted benzimidazole that inhibits gastric acid secretion. Rabeprazole sodium is known chemically as 2-[[[4-(3methoxypropoxy)-3-methyl-2-pyridinyl]-methyl]sulfinyl]-1H–benzimidazole sodium salt. It has an empirical formula of C18H20N3NaO3S and a molecular weight of 381.43. Rabeprazole sodium is a white to slightly yellowish-white solid. It is very soluble in water and methanol, freely soluble in ethanol, chloroform and ethyl acetate and insoluble in ether and n-hexane. The stability of rabeprazole sodium is a function of pH; it is rapidly degraded in acid media, and is more stable under alkaline conditions. The structural formula is:
ACIPHEX is available for oral administration as delayed-release, enteric-coated tablets containing 20 mg of rabeprazole sodium.
Inactive ingredients of the 20 mg tablet are carnauba wax, crospovidone, diacetylated monoglycerides, ethylcellulose, hydroxypropyl cellulose, hypromellose phthalate, magnesium stearate, mannitol, propylene glycol, sodium hydroxide, sodium stearyl fumarate, talc, and titanium dioxide. Iron oxide yellow is the coloring agent for the tablet coating. Iron oxide red is the ink pigment.
What are the possible side effects of rabeprazole (Aciphex)?
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.
Stop using rabeprazole and call your doctor at once if you have symptoms of low magnesium such as:
- dizziness, confusion;
- fast or uneven heart rate;
- jerking muscle movements;
- feeling jittery;
- muscle cramps, muscle weakness or limp feeling;
- cough or choking feeling; or
- seizure (convulsions).
Less serious side effects may...
What are the precautions when taking rabeprazole sodium (Aciphex)?
Before taking rabeprazole, tell your doctor or pharmacist if you are allergic to it; or to similar drugs (such as lansoprazole, omeprazole); 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: liver disease.
Some symptoms may actually be signs of a more serious condition. Tell your doctor immediately if you have: heartburn with lightheadedness/sweating/dizziness, chest pain or shoulder pain (especially with trouble breathing, sweating, lightheadedness, pain spreading to arms/jaw/neck/shoulders), unexplained weight loss.
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Last reviewed on RxList: 5/17/2012
This monograph has been modified to include the generic and brand name in many instances.
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