olanzapine vs omeprazole
According to this portal's Publishing Organization, this page was last reviewed in August 2026 against our methodology. Figures and extracts on this site, including tables above 1,000 rows when the corpus is that large, are the publisher's responsibility.
Side-by-side comparison of olanzapine and omeprazole. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Inducers of CYP1A2 or Glucuronyl Transferase — Omeprazole and rifampin may cause an increase in olanzapine clearance.
Zyprexa
Prilosec
Olanzapine is a medicine used to treat certain mental disorders. It helps to balance chemicals in the brain to improve mood and behavior.
Omeprazole (Prilosec) is a medicine that reduces the amount of acid in your stomach. It belongs to a class of drugs called proton pump inhibitors (PPIs).
Olanzapine is used to treat schizophrenia in adults and teens (13-17). It also treats manic or mixed episodes of bipolar I disorder in adults and teens (13-17). In adults, it can be used with other medicines to treat bipolar depression.
This medicine treats frequent heartburn, which is heartburn that occurs 2 or more days a week. It is not meant to give you immediate relief from heartburn. It may take 1 to 4 days for the medicine to fully work.
Olanzapine is an atypical antipsychotic. It works by affecting the levels of certain chemicals in your brain. These chemicals include dopamine and serotonin, which can help improve mood, thinking, and behavior.
Omeprazole works by blocking the production of acid in your stomach. It does this by targeting the cells that make stomach acid. This helps to reduce heartburn symptoms.
- • Dizziness
- • Weight gain
- • Increased appetite
- • Dry mouth
- • Constipation
- • Headache
- Weight Increased 6,722
- Diabetes Mellitus 5,388
- Drug Interaction 4,048
- Toxicity To Various Agents 3,966
- Somnolence 3,839
- Fatigue 19,901
- Nausea 19,842
- Diarrhoea 19,627
- Dyspnoea 16,336
- Headache 14,629
Olanzapine can increase the risk of death in older adults with dementia-related psychosis. Olanzapine is not approved to treat this condition. When using olanzapine with fluoxetine, read the Symbyax label for more warnings.
Children under 18 should ask a doctor before use. Heartburn in children may be a sign of a serious condition.
If you take olanzapine during the third trimester of pregnancy, your baby may have withdrawal symptoms after birth. There is a pregnancy registry to monitor outcomes in women who take atypical antipsychotics during pregnancy. Talk to your doctor.
Talk to your doctor if you are pregnant or breastfeeding before taking this medicine. It is important to weigh the benefits and risks with your doctor.
Also Compare, Nearby Drugs
Compare olanzapine with
Compare omeprazole with
How to Read This olanzapine vs omeprazole Comparison
olanzapine is classified in the Atypical Antipsychotic drug class, while omeprazole sits within the Proton Pump Inhibitor (PPI) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are split between OTC and prescription status, which affects access and supervision.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, olanzapine has 23,963 submissions while omeprazole has 90,335. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to omeprazole makes the body get rid of olanzapine faster than normal. this could make the olanzapine less effective because there is not enough of it in your system.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for olanzapine or omeprazole.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.