Try nicotine replacement, such as over-the-counter gum or lozenges, or ask your doctor about a prescription medication that can help you quit. Lose excess pounds. Being .Cialis reaches its maximum effectiveness two hours after you take it. How can I best manage other health conditions with my erectile dysfunction? What are the alternatives to the primary approach that you’re suggesting? Lifestyle and home remedies For many people, erectile dysfunction is caused or worsened by lifestyle choices. Sexual activity may be a strain on your heart, especially if you have heart disease. You can take Viagra daily, but because the medication stays in your system for four to six hours, it will not be effective all day. · Below are details about Viagra dosages commonly used to treat erectile dysfunction (ED).. Viagra form. Viagra comes as tablets that you swallow. Viagra strengths. Viagra tablets are available in. Generic Viagra (sildenafil) is available as a , , , and milligram (mg) pill and in liquid form. It’s meant to be taken as needed — about an hour before sex — but shouldn’t be. Oral medications are a successful erectile dysfunction treatment for many men. They include: Sildenafil (Viagra) Tadalafil (Adcirca, Cialis) Vardenafil (Levitra, Staxyn) Avanafil (Stendra) All four medications enhance the effects of nitric oxide — a natural chemical your body produces that relaxes muscles in the penis.This preference is the reason why a low-dose prescription of Tadalafil is the most popular way to manage the symptoms of ED. Do you use any illegal drugs? Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. If you are a Mayo Clinic patient, this could include protected health information. Have you ever been diagnosed with a mental health condition? Ask your pharmacist for a list of the ingredients.