Prevacid, or Lansoprazole, is used to treat conditions in which there is too much acid in the stomach, like duodenal and gastric ulcers and gastroesophageal reflux disease (GERD), a condition in which the acid in the stomach washes back up into the esophagus. Prevacid is sometimes used in combination with antibiotics to treat ulcers associated with infection caused by the H. pylori bacteria, and is also used to treat Zollinger-Ellison disease, a condition in which the stomach produces too much acid.
Be sure to tell your doctor of any allergies you have whether it is to medication or food, preservatives, or dyes. Tell your doctor immediately if you are, or become pregnant, or are breastfeeding. Also, tell your doctor of any other medications you are taking, including vitamins and supplements, and any medical conditions you may have.
Avoid alcohol when taking this medicine.
It is very important that you take this medicine exactly as your doctor tells you to. Do not take more or less medicine than directed. If you miss a dose of this medicine, take it as soon as you remember, unless it is almost time for your next dose. Do NOT double doses.
Check with your doctor as soon as possible if any of the following side effects occur: diarrhea; skin rash or itching; abdominal or stomach pain; increased or decreased appetite; joint pain; nausea; vomiting; anxiety; cold or flu-like symptoms; constipation; increased cough; mental depression; muscle pain; rectal bleeding; or unusual bleeding or bruising.
The active ingredient in lansoprazole delayed-release capsules is a substituted benzimidazole, 2-[[[3-methyl-4-(2,2,2-trifluroethoxy)-2-pyridyl]methyl]sulfinyl] benzimidazole, a compound that inhibits gastric acid secretion. Its empirical formula is C16H14F3N3O2S with a molecular weight of 369.37. Lansoprazole is a white to brownish-white odorless crystalline powder which melts with decomposition at approximately 166°C. Lansoprazole is freely soluble in dimethylformamide; soluble in methanol; sparingly soluble in ethanol; slightly soluble in ethyl acetate, dichloromethane and acetonitrile; very slightly soluble in ether; and practically insoluble in hexane and water. Prevacid is supplied in delayed-release capsules for oral administration. The delayed-release capsules contain the active ingredient, lansoprazole, in the form of enteric-coated granules and are available in two dosage strengths: 15 mg and 30 mg of lansoprazole per capsule. Each delayed-release capsule contains enteric-coated granules consisting of lansoprazole, hydroxypropyl cellulose, low substituted hydroxypropyl cellulose, colloidal silicon dioxide, magnesium carbonate, methacrylic acid copolymer, starch, talc, sugar sphere, sucrose, polyethylene glycol, polysorbate 80, and titanium dioxide. Components of the gelatin capsule include gelatin, titanium dioxide, D&C red no. 28, FD&C blue no. 1, FD&C green no. 3 (Prevacid 15 mg capsules only), and FD&C red no. 40.
Prevacid has the following structural formula: