NSAIDs (Non Steroidal AntiInflamatory Drugs) such as aspirin, ibuprofen, and naproxen sodium (Aleve) increase my tinnitus.

You can look up the side effects of all the medications you take, including over-the-counter. That way if a weird symptom turns up, like tinnitus, you'll know what caused it and let your doctor know. There are often alternatives without the same side effects. I check drugs at www.rxlist.com .

Grapefruit potentiates some drugs. There's a short article about it in the new National Geographic Magazine. That kind of interaction is included in the rxlist "Side Effects" and "Patient Information" sections.