Click here for an email preview. Alternatively, the medicine may be taken 30 minutes to 4 hours before sexual intercourse. Ask your healthcare professional how you should dispose of any medicine you do not use. Storage Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. This site is intended only for U. We covered this topic in more detail in our guide to how long Viagra and other ED medications last. Slowly pull back the plunger until the required dose. · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!test1.ru has been visited by 10K+ users in the past monthOver 20 Years Online · Over Products Tested · Honest & Unbiased Reviews. The Savings Offer and Program expire on 12/31/ For further information, call , visit test1.ru, or write: Viatris Inc., P.O. Box , Mission, KS Eligible patients may save on their VIAGRA® (sildenafil citrate) prescription with the VIAGRA savings card.