sildenafil, Viagra, Revatio (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:

It is expected that rifampin will decrease blood levels of sildenafil and probably reduce its effectiveness.

PREGNANCY: Although extensive testing in animals has demonstrated no negative effects on the fetus, sildenafil has not been studied in pregnant women. There is no effect on sperm count or motility of sperm in men.

NURSING MOTHERS: It is not known whether sildenafil is excreted into breast milk.

SIDE EFFECTS: Approximately 15% of persons taking sildenafil experience side effects. The most common side effects are facial flushing (1 in 10), headaches (1 in 6), stomach pain, nasal congestion, nausea, diarrhea, and an inability to differentiate between the colors green and blue. Rare cases of sudden loss of hearing have been reported with phosphodiesterase inhibitors such as sildenafil, sometimes with ringing in the ears and dizziness. If changes in hearing occur, patients should discontinue their sildenafil and seek immediate medical attention.

Reference: FDA Prescribing Information

Last Editorial Review: 7/13/2010

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