Omeprazole Side Effects

Although most people tolerate omeprazole well, there are potential side effects of the medication. Some of the common omeprazole side effects can include headaches, diarrhea, and dizziness. In many cases, the side effects of omeprazole are minor and are easily treated. However, if you develop more serious side effects, such as depression or signs of an allergic reaction, you should notify your healthcare provider right away.

 

An Introduction to Omeprazole Side Effects

As with any medicine, side effects are possible with omeprazole (Prilosec®). However, not everyone who takes the medication will experience side effects. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with omeprazole. Your healthcare provider can discuss a more complete list of omeprazole side effects with you.)
 

Common Side Effects of Omeprazole

Omeprazole has been studied thoroughly in clinical trials, in which the side effects of a group of people taking the drug are documented. In these studies, the most common side effects of omeprazole included:
 
  • Headaches -- in up to 6.9 percent of people
  • Abdominal pain (or stomach pain) -- up to 5.2 percent
  • Diarrhea -- up to 3.7 percent
  • Upper respiratory tract infections, such as the common cold -- up to 1.9 percent
  • Dizziness -- up to 1.5 percent
  • Constipation -- up to 1.1 percent
  • Back pain -- up to 1.1 percent.
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(Omeprazole Side Effects Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;