If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil. Follow the manufacturer’s directions to use and clean the oral syringe. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Without physical action to the penis, such as that occurring during sexual intercourse, sildenafil will not work to cause an erection. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Tadalafil Cialis. Tell your doctor or pharmacist if you are taking nitrates medications for chest pain such as isosorbide dinitrate Isordil , isosorbide mononitrate Monoket , and nitroglycerin Nitromist, Nitro-Dur, Nitrostat.Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes . AdEnjoy Greater Libido & Performance. Fast Express test1.ruries: Various · Best Sellers · Aphrodisiacs · All Products · Ubulawu Dream Herbs. AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Take Charge of Your Sexual Health with Our Top-Rated Male Enhancement Products!Honest & Unbiased Reviews · Over 20 Years Online · Over Products Tested.