Related Story 11 tips for better foreplay before sex Viagra dosage Most men start by taking one Viagra 50 mg tablet. For further information, click through to our Viagra Connect customer reviews page. Just because a side effect is stated here doesn’t mean that all people taking Viagra will experience that or any side effect. All Viagra is the same — powered by the same active ingredient, Sildenafil. You might need to take Viagra on a few different occasions before it starts to work for you. Don’t drive or operate machinery until you know how this medicine affects you and you are sure it won’t affect your performance.Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is approved for this use in males. Viagra Connect, Viagra and Sildenafil are erectile dysfunction treatments that work within your body to help you achieve and maintain an erection that is hard enough for sexual intercourse. The treatment allows the blood vessels within the body to expand and relax, causing blood to flow to the penis, resulting in an erection. Viagra Connect is a medicine used to treat erectile dysfunction (ED) in men. Once you have taken Viagra Connect, it stays active in your body for up to four hours. 1 After that, the medicine gets broken down by the liver and is flushed out of the body. It’s important to note that although Viagra Connect can stay active for up to four hours.