Common side effects of rabeprazole include an unpleasant taste or a change in taste, diarrhea, constipation, and excessive gas, according to Drugs.com. Less common side effects include dark urine, dry mouth, nausea and weight changes.
Rare but potentially serious side effects of rabeprazole include seizures, blood in the urine, breathing difficulties and mouth sores, reports Drugs.com. Individuals with these symptoms should seek medical attention. Other possible side effects include headache, sore throat and a runny nose, according to Duanereade by Walgreen's.
Rabeprazole is prescribed as treatment for ulcers and gastroesophageal reflux disease, as stated by WebMD. Known by the brand name Aciphex, the medication is taken once or twice daily. Dosage and length of treatment are determined by the severity of symptoms.
For gastroesophageal reflux disease, the common dosage is 20 milligrams per day, as reported by Duanereade by Walgreen's. Individuals taking Aciphex for a duodenal ulcer generally take 20 milligrams daily for up to four weeks. For treatment of H. pylori infection, 20 milligrams is taken twice daily for one week.
Certain medications can interfere with the effectiveness of Aciphex, including antibiotics, warfarin, iron supplements, digoxin and methotrexate, as reported by Duanereade by Walgreen's. The drug is a proton pump inhibitor.