You are encouraged to report adverse events related to Viatris products by calling U. If you forget to take it If you have pulmonary hypertension and you forget to take a dose of sildenafil, take it as soon as you remember unless it’s nearly time for your next dose. How to take tablets Swallow tablets whole with a drink of water or juice but not grapefruit juice. It works for up to 36 hours. Here are five things you can do today: Quit smoking Eat a balanced diet that decreases blood pressure and controls blood sugar Reduce stress Reduce alcohol consumption Get more sleep Whether you decide to take Viagra or not, taking steps to improve your sex life is an act of self-love. The usual adult dose is 20mg taken 3 times a day. Getting a prescription for Viagra online is a good option if you want to keep things discreet and convenient.Sildenafil tablets for erectile dysfunction come in different strengths ranging from 25mg to mg. The usual dose is 50mg, when you need it. Do not take it more than once a day. The dose can be increased to mg or decreased to 25mg depending on its effect. Take sildenafil up to 4 hours before you want to have sex. General information about the safe and effective use of VIAGRA. Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use VIAGRA for a condition for which it was not prescribed. Do not give VIAGRA to other people, even if they have the same symptoms that you have. It may . If Viagra doesn’t work after 30 minutes, don’t take any more than the daily dose that your doctor prescribed. Never take more than mg of Viagra in a hour period.