Healthcare providers have experience talking about ED and providing treatment options without any judgment or shame. These medicines all work well for ED. Generic versions of sildenafil, vardenafil and tadalafil are available. Which Works Faster? Its effects might last longer if you have mild to moderate ED.Viagra dosage for erectile dysfunction (ED) is usually milligrams (mg), but those over 65 may start at 25 mg. Your doctor will also need to consider possible drug interactions. Here are five things to know about the new topical gel and how it can help if you’re struggling to get an erection: 1. It Targets the Problem and Works Quickly. Being a topical means MED  · Viagra dosage is not based on weight, but your age can affect your dosage. Specifically, you may have a lower starting dosage than usual if you’re over age