What Are the Side Effects of Omeprazole?


Quick Answer

The most common side effects of omeprazole are diarrhea, vomiting, headaches, rash, dizziness and nausea, according to MedicineNet.com. Less common side effects include weakness, muscle cramps, abnormal heartbeat and nervousness. Most patients tolerate the drug well with few or no side effects.

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Full Answer

Omeprazole is used to treat heartburn and acid reflux, according to WebMD. It relieves symptoms such as coughing and difficulty swallowing, allowing the stomach and esophagus to heal from acid damage. Omeprazole can be purchased without a prescription in the United States. Patients who use it should be advised that it takes one to four days to have full effect and does not relieve heartburn immediately. Omeprazole works by decreasing the amount of acid the stomach produces.

Patients who experience serious side effects such as persistent diarrhea, muscle spasms or irregular heartbeats after taking omeprazole should contact their doctors immediately, advises WebMD. In rare cases, patients may experience severe allergic reactions to omeprazole. Signs of an allergic reaction include rash, hives, dizziness and trouble breathing. Patients are advised to see immediate medical assistance if they have an allergic reaction to omeprazole. Patients with liver disease or who are taking other medications or herbal supplements for heartburn should speak to their doctors before taking omeprazole.

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