This development was credited largely “due to the introduction of generic products. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. The products discussed in this site may have different product labeling in different countries. You can take this medicine with or without food 30 minutes before sex, depending on the dose. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. You are encouraged to report adverse events related to Viatris products by calling U.It’s a prescription drug that’s used in adult males* with ED. With ED, you have trouble getting or keeping an erection. Viagra treats ED by increasing the amount . Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or .  · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase .