Always talk to your doctor first, because herbs and supplements may interfere with other medicines you are taking.

Herbal supplements rarely interfere with prescription medications.

Earlier studies showed that another popular herbal supplement, St. John's wort, interfered with indinavir, another H.I.V. drug.

First, many supplements may interfere with your cancer treatment, so never take anything without discussing it with your cancer doctor and treatment team.

Even supplements can have side effects and may interfere with medications you take.

The supplements may also interfere with the absorption of manganese, which in turn could actually impair bone development.

This supplement may also interfere with other medicines, and potential interactions between it and drugs and herbs should be considered.

If you do use them, tell your doctor: Herbs and supplements can interfere with medications and may be unsafe for people with certain medical conditions.

Antacids, supplements, or medicines that contain aluminum, calcium, magnesium, or other minerals can interfere with how your body absorbs alendronate and cholecalciferol.