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Most Commonly Used
Omeprazole 40mg DR Cap
Mylan Pharmaceuticals Inc
Pill Identification: MYLAN 5222 MYLAN 5222 
Drug Image file DrugItem_13641.JPG
Omeprazole 10mg DR Cap
Mylan Pharmaceuticals Inc
Pill Identification: MYLAN 5211 MYLAN 5211 
Drug Image file DrugItem_876.JPG
Omeprazole 20mg DR Cap
Dr. Reddy's Laboratories, Inc.
Pill Identification: OMEPRAZOLE 20 mg R 158 
Drug Image file DrugItem_16527.JPG
Omeprazole 20mg DR Tab
Perrigo Pharmaceuticals Company
Pill Identification: 20 
Drug Image file DrugItem_14703.JPG
Omeprazole 20mg DR Cap
Mylan Pharmaceuticals Inc
Pill Identification: MYLAN 6150 MYLAN 6150 
Drug Image file DrugItem_875.JPG
Also See:
  • Answers to Frequently-Asked Questions (FAQs)
  • Other Class Related Drugs
  • Additional Patient Usage Statistics

Common Side Effects of Omeprazole
Omeprazole can cause side effects. Tell your doctor immediately if you have watery stools or severe diarrhea. This may be caused by a serious infection.

Also tell your doctor right away if you have:
  • Trouble swallowing food
  • Sudden and severe nausea, stomach pain, or vomiting
  • Weight loss
  • Vomit blood, see blood in your stools, or have dark tarry stools
  • Light-headedness and dizziness
  • Shortness of breath and wheezing
  • Trouble breathing
  • Unexplained weight loss
Your risk for broken bones in your hip, spine, or wrist may increase while taking omeprazole. The risk increases if you are older than 50, take high doses of omeprazole, or take it for more than a year. Talk with your doctor about your risk of having bone fractures while taking omeprazole.

Contact your doctor immediately if, while taking omeprazole, you have side effects including:
  • Fast, slow, or uneven heartbeat
  • Seizures or tremors (shakiness)
  • Abnormal or fast heartbeat
  • Feeling jittery, muscle weakness, spasms, cramps, or muscle aches
  • Light-headedness, fainting, or dizziness
The most common side effects of omeprazole include:
  • Headache
  • Constipation, diarrhea, gas, or stomach pain
  • Nausea or vomiting
Tell your doctor if these side effects do not go away or get worse while taking omeprazole.