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More information on sildenafil (Viagra)
- Petition to Require a Black Box Warning for Erectile Dysfunction Drugs Sildenafil (Viagra), Tadalafil (Cialis) and Vardenafil (Levitra) to Warn of the Potential for Irreversible Vision Loss, October 20, 2005
- Letter Urging the Therapeutic Products Program in Canada to Require Warnings on the Label of Sildenafil (Viagra), August 24, 1998
- Letter Urging FDA to Convene an Advisory Committee to Review Problems Related to the Use of Sildenafil (Viagra), August 20, 1998
- Letter Requesting Warnings on Sildenafil (Viagra), August 27, 1998
- Petition to Add Information about Sildenafil's (Viagra's) Dangers to the Drug's Label, July 1, 1998