Side Effects Are Minimal. Pearlman says it can often take months to get an appointment with a healthcare provider who can prescribe the medications commonly used to treat ED. Especially tell your healthcare provider if you take any of the following: medicines called nitrates medicines called guanylate cyclase stimulators such as Adempas riociguat medicines called alpha-blockers, such as Hytrin terazosin HCl , Flomax tamsulosin HCl , Cardura doxazosin mesylate , Minipress prazosin HCl , Uroxatral alfuzosin HCl , Jalyn dutasteride and tamsulosin HCl , or Rapaflo silodosin. Severe liver disease. These medicines all work well for ED. Medicines that block an enzyme called CYP3A4.Eroxon, the brand name for MED, is currently available in Belgium and the U.K. It claims to “help you get an erection within 10 minutes.” About half of all men will experience ED at some point. According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with more than $50 per. Both Viagra and Viagra Connect contain the same active ingredient: Sildenafil. However, Viagra Connect is only available over the counter in the licensed strength of 50mg. In order to purchase Viagra Connect over the counter, you will be required to fill out a medical questionnaire which will be reviewed and authorised by the .