Misoprostol - Side Effects and Contraindications

Side Effects and Contraindications

The most commonly reported adverse effect of taking a misoprostol 200 µg tablet by mouth four times a day to reduce the risk of NSAID induced gastric ulcers is diarrhea. In clinical trials, an average 13% of patients reported diarrhea, which was dose-related and usually developed early in the course of therapy (after 13 days) and was usually self-limiting (often resolving within 8 days), but sometimes (in 2% of patients) required discontinuation of misoprostol.

The next most commonly reported adverse effects of taking a misoprostol 200 µg tablet by mouth four times a day to reduce the risk of NSAID induced gastric ulcers are: abdominal pain, nausea, flatulence, headache, dyspepsia, vomiting, and constipation, but none of these adverse effects occurred significantly more often than when taking placebos. In practice, fever is almost universal when multiple doses are given every 4 to 6 hours.

Misoprostol should not be taken by pregnant women to reduce the risk of NSAID induced gastric ulcers because it increases uterine tone and contractions in pregnancy which may cause partial or complete abortions, and because its use in pregnancy has been associated with birth defects.