Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.
This drug should not be used with the following medications because very serious interactions may occur: atazanavir, nelfinavir.
If you are currently using any of these medications, tell your doctor or pharmacist before starting omeprazole.
Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: certain drugs to suppress the immune system (e.g., cyclosporine, tacrolimus), cilostazol, diazepam, disulfiram, phenytoin, tipranavir, voriconazole, warfarin.
Omeprazole can decrease the effectiveness of certain drugs which require stomach acid in order to be absorbed. Before using this medication, consult your doctor or pharmacist on how to manage such a potential interaction if you are taking the following drugs: ampicillin, azole antifungals (e.g., ketoconazole, itraconazole), iron supplements.
Based on information for similar drugs, omeprazole may increase the amount of digoxin that is absorbed into your blood. Consult your doctor or pharmacist for details if you also take digoxin.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.