What is omeprazole?
Omeprazole is a proton pump inhibitor (PPI) and is one of the most prescribed medicines worldwide. It inhibits gastric acid production and is used in sodburns, gastroesophageal reflux disease (GERD), gastric and twelve-fingered intestinal ulcers and as gastric protection for certain drugs.
Omeprazole is available under the brand name Antra MUPS® and as numerous generic drugs. In low dosages (20 mg) it is also available without prescription, higher dosages and long-term use are subject to prescription.
The effect does not immediately apply – full acid inhibition is achieved after 2-5 days.
Active Ingredients & Mechanism of Action
Active ingredient: Omeprazol
Omeprazole irreversibly inhibits the proton pump (H+/K+-ATPase) in the test cells of the stomach:
Active mechanism:
- Omeprazole is a prodrug – it is only activated in the acid medium of the document cell
- irreversibly connects to the proton pump
- Blocks the last step of gastric acid production
- Reduces stomach acid by up to 90%
Initiation of action:
- First improvement within 1-2 hours
- Full effect after 2-5 days of regular intake
- New proton pumps have to be formed again
Activity: After deposition, acid production is normalized within 3-5 days, as new proton pumps are replicated.
Who is it suitable for?
Omeprazole is suitable for:
- Gastroesophageal reflux disease (GERD)
- Sodburning and acidic impact
- Refluxesophagitis (inflammation of the esophagus)
- Gastrointestinal ulcers
- Eradication therapy at Helicobacter pylori (in combination with antibiotics)
- Gastric protection at NSAID intake (Ibuprofen, Diclofenac)
- Zollinger-Ellison Syndrome
**Not suitable as permanent solution for:* *
- Occasional heartburn (Antazida can be sufficient)
- Unclear superstructure problems without diagnostics
Available Dosages
Available starches:
- 10 mg (free of prescription)
- 20 mg (free of prescription)
- 40 mg (prescribed)
Other dosages:
- Sodburning/light reflux: 20 mg 1x daily
- Refluxesophagitis: 20-40 mg 1x daily for 4-8 weeks
- Gastric ulcer: 20 mg 1x daily for 4-8 weeks
- Gastric protection at NSAID: 20 mg 1x per day
- Helicobacter-Eradication: 20 mg 2x daily (7-14 days, with antibiotics)
How to Take
Intake:
- Morning, 30 minutes before breakfast
- Swallow capsule/tablet with water
- MUPS tablets can be dissolved in water
Important notes:
- Regularly take, not only in case of complaints
- Do not drop abruptly after long-term therapy (rebound effect possible)
- Long-term use (>8 weeks) only under medical control
- Regular check of the need for therapy
Contraindications
**Omeprazole must not be taken at:* *
- hypersensitivity to omeprazole or other PPIs
- At the same time taking Nelfinavir (HIV medication)
Preview at:
- liver failure (dose adjustment, max. 20 mg
- Long-term application (refer to risks)
- Suspicion of stomach cancer (Symptome can be masked!)
Pregnant period: Omeprazole can be used in pregnancy if the benefit is outweighed. It is converted into breast milk in small amounts.
Possible Side Effects
Acid (1-10%):
- Headaches
- stomach pain
- diarrhea
- Blocking
- nausea
- Blowing
Occasionally:
- Squeeze
- Sleep disorders
- Skin rash
For long-term use (>1 year):
- Increased risk of bone fractures (height, wrist)
- Magnesium deficiency
- Vitamin B12 deficiency
- Possibly increased risk for Clostridium difficile infections
- Possibly increased risk of kidney disease
Rebound effect: After deposition, gastric acid can be produced temporarily. Slip recommended.
Interactions
Contracted:
- Nelfinavir (HIV) – loss of effect
Sustainability of:
- Clopidogrel (Plavix®) – Omeprazol inhibits CYP2C19 and can impair the activation of Clopidogrel. Alternative: Pantoprazole
Changed absorption by pH change:
- Ketoconazole, Itraconazole – reduced absorption
- Iron preparations – reduced intake
- Vitamin B12 – reduced intake for long-term use
**Omeprazole inhibits CYP2C19: * *
- Diazepam – slowed down
- Phenytoin – increased levels possible
Frequently Asked Questions
Similar Medications
Is omeprazole right for you?
A licensed doctor will review your information and issue a prescription if suitable. Discreet and secure.
Important Notice
This information does not replace medical advice. If you have questions about your health or the suitability of this medication, please consult a doctor. Read the package leaflet before use.




