Last updated on Jan 8 2024. Sildenafil is used to treat male sexual function problems impotence or erectile dysfunction-ED In combination with sexual stimulation sildenafil works by. Sildenafil oral sil-DEN-a-fil Brand names. 50 mg taken as needed about 1 hour before sexual activity It can be taken 30 minutes to 4 hours before sexual. Usual Adult Dose for Erectile Dysfunction 50 mg orally once a day as needed about 1 hour prior to sexual..
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