Can You Take Omeprazole and Potassium Together?
Omeprazole's label advises telling your doctor if you have low potassium levels before starting treatment.
See the full Omeprazole page and Potassium page for other reviewed interactions and reference information.
What the interaction means
Omeprazole's FDA-approved Medication Guide states: "Before taking omeprazole delayed-release capsules, tell your doctor about all of your medical conditions, including if you: have low magnesium levels, low calcium levels and low potassium levels in your blood."
Why it may happen
Not further specified by the label beyond this pre-treatment disclosure caution -- it does not give potassium the same detailed clinical mechanism or incidence data documented for magnesium (hypomagnesemia) elsewhere in the same label.
Practical context
This is a lighter-weight finding than omeprazole's other documented nutrient effects: it reflects a general pre-treatment disclosure caution for patients who already have low potassium, not a specific claim that omeprazole itself lowers potassium levels the way it's documented to do for magnesium.
What the sources say
Last reviewed 2026-08-23
Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.
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