If you see air bubbles in the syringe, repeat the steps. Your doctor may adjust your dose as needed and tolerated. I order again just to make sure, but if I get the same results I will likely try another product. Generic Viagra really did the trick. All I can say is, overall, I am thrilled. Happy wife, happy life! · Adults—20 milligrams (mg) 3 times a day. Your doctor may adjust your dose as needed and tolerated. However, the dose is usually not more than 80 mg 3 times a .  · Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called Missing: goodrx. AdGet Deals and Low Prices On sildenafil mg On Amazon. Read Customer Reviews & Find Best Sellers. Free, Easy Returns On Millions Of Items.1M+ visitors in the past month.