If you are currently being treated with any of the following medications, you should not use zinc without first talking to your healthcare provider.

Blood Pressure Medications, ACE Inhibitors
A class of medications called ACE Inhibitors, such as captopril and enalpril, used for high blood pressure may deplete zinc stores.

Antibiotics
Zinc may decrease the absorption of oral quinolones, a class of antibiotics that includes ciprofloxacin, norfloxacin, ofloxacin, and levofloxacin, as well as tetracycline antibiotics (including tetracycline, doxycycline, and minocycline).

Hormone Replacement Therapy (HRT)
HRT, consisting of estrogen and progesterone derivatives may reduce loss of zinc in the urine, particularly in women with osteoporosis.

Hydralazine
There has been at least one report of an interaction between zinc and hydralazine, a medication used to treat high blood pressure, which resulted in a lupus-erythematosus-like syndrome (characterized by a facial butterfly rash, fever, leg and mouth ulcers, and abdominal distress).

Immunosuppressant Medications
Since zinc supports immune function, it should not be taken with corticosteroids, cyclosporine, or other medications intended to suppress the immune system.

Nonsteroidal Anti-inflammatory Drugs (NSAIDs)
Zinc interacts with NSAIDs and could reduce the absorption and effectiveness of these medications. Examples of NSAIDs, which help to reduce pain and inflammation, include ibuprofen, naprosyn, piroxicam, and indomethacin.

Penicillamine
This medication, used to treat Wilson's disease (excessive amounts of copper that accumulate in the brain, liver, kidney, and eyes) and rheumatoid arthritis, decreases zinc levels.