Do not take a double dose to make up for a missed one. Trimazosin Other Interactions Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food. If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when you get sexually excited. The studies that established benefit demonstrated improvements in success rates for sexual intercourse compared with placebo.Who may not be able to take sildenafil. Sildenafil is not suitable for some people. To make sure it’s safe for you, speak to your doctor or pharmacist before taking sildenafil if you: have ever had an allergic reaction to sildenafil or any other medicine. have recently had a stroke, heart attack or a heart problem – your doctor should. Ad93% of users reported improved confidence in achieving an erection from using Eddie. ED Treatment without doctor’s visits, injections, or surgical implants. Get Eddie for test1.ru has been visited by 10K+ users in the past monthCourses: Physical Vs Mental ED, Learning About ED, Product and more. Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose). Written by Brian Leonard, PharmD, BCACP, BCGP.