To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and site usage information with other information we have about you. From Mayo Clinic to your inbox Sign up for free and stay up to date on research advancements, health tips, current health topics, and expertise on managing health. It is a highly efficient and reliable solution that can cure other blood-flow-related problems and conditions like hypertension and hyperplasia also. If you are allergic to Sildenafil citrate than avoid taking any ED medicine which contains the same ingredient as it may harm your health severely. However, there are certain side-effects that you may or may not encounter while taking the medication. If you are a Mayo Clinic patient, this could include protected health information. There is another treatment available specifically made for women. · For oral dosage form (tablets): Adults up to 65 years of age—50 milligrams (mg) as a single dose no more than once a day, 1 hour before sexual intercourse. . Take sildenafil at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). Do not take more than once daily. A high- fat meal may . · Does Kamagra Oral Jelly Work for ED? While there’s relatively little research on Kamagra itself, there’s a ton of established research that concludes that sildenafil or .