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Does levonorgestrel interact with other medications or foods?

Levonorgestrel does not interact with any foods. There are some medications, however, that may make levonorgestrel less effective. These include: antifungal medications, aprepitant, topiramate, any barbiturate, tetracyclines, bosentan, St. John's wort, carbamazepine, rufinamide, felbamate, rifampin, griseofulvin, various penicillins, HIV protease inhibitors, oxcarbazepine, hydantoins, nevirapine, and modafinil.

Lamotrigine may not work as well while you're on levonorgestrel. Other drugs that, if taken with levonorgestrel, may cause increased side effects or have diminished effectiveness, include: anticoagulants, beta-adrenergic blockers, selegiline, valproic acid, theophylline, corticosteroids, and troleandomycin.

In general, if you're taking any prescription medications, you may want to consult with your doctor before taking levonorgestrel, and carefully read the packaging label to monitor any possible interactions with over-the-counter medications, supplements, vitamins, or herbs that you may be taking.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.