probenecid, (Benemid - brand no longer available)

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GENERIC NAME: probenecid

BRAND NAME: Benemid (brand is no longer available)

DRUG CLASS AND MECHANISM: Probenecid is an oral drug used for reducing blood uric acid levels in patients with hyperuricemia (high uric acid) and/or. High uric acid can cause attacks of gout and kidney stones. Probenecid prevents attacks of gout by reducing uric acid levels in the blood. It does this by preventing the reabsorption of uric acid by the kidney and increasing its excretion from the body in the urine. Probenecid also blocks excretion by the kidney of penicillin and related antibiotics and is used for increasing the levels of the antibiotics in the blood and increasing their effectiveness when treating infections.

PRESCRIPTION: Yes

GENERIC AVAILABLE: Yes

PREPARATIONS: Tablets: 0.5 g

STORAGE: Probenecid should be stored at room temperature, 15-30 C (59-86 F).

PRESCRIBED FOR: Probenecid is used for the treatment of hyperuricemia associated with gout. It also is used for increasing blood levels of penicillin-type antibiotics (for example, ampicillin and amoxicillin) when treating gonorrhea.

DOSING: The usual adult dose for hyperuricemia is 500 mg twice daily and the maximum dose is 2 grams daily. When combined with penicillin type antibiotics to treat infections, the usual dose is 500 mg 4 times daily. Patients should drink plenty of water in order to prevent formation of kidney stones and take probenecid with food or antacid to reduce stomach upset.

DRUG INTERACTIONS: Probenecid blocks excretion of some drugs by the kidney and, therefore, may increase blood levels and side effects of methotrexate (Rheumatrex, Trexall) and nonsteroidal antiinflammatory drugs (NSAIDs), for example, ibuprofen (Advil), naproxen (Aleve), indomethacin (Indocin), ketorolac (Toradol) and others. Aspirin may reduce the action of probenecid through unknown mechanisms.

PREGNANCY: Probenecid has not been adequately studied in pregnant women.

NURSING MOTHERS: Probenecid has not been adequately studied in nursing mothers.

SIDE EFFECTS: Common side effects of probenecid include headache, dizziness, nausea, vomiting, skin rash, sore gums, and fever. Probenecid may cause a flare of gout and kidney stones, and it is not started during an acute attack of gout. Serious but rare side effects include reduced red blood cell counts (anemia), liver damage and severe allergic reactions.

Reference: FDA Prescribing Information


Last Editorial Review: 2/27/2009




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