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. There are no adequate and well-controlled studies of sildenafil in pregnant women. Do not take more or less of it or take it more often than prescribed by your doctor. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. Do not stop taking sildenafil without talking to your doctor. Methodology We researched 19 online platforms for erectile dysfunction treatment to learn more about the process of ordering ED pills online. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.AdOrder Sildenafil Citrate from trusted suppliers with immediate availabilities. Find better prices by comparing offers from trusted suppliers. Request quotes now! 1 day ago · Roman is a healthcare technology company that sells FDA-approved men’s health products.. The first step is scheduling a $15 consultation with one of their licensed healthcare professionals to.  · For treatment of erectile dysfunction: 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. Alternatively, the medicine may be taken 30 minutes to 4 hours before sexual intercourse. Your doctor may adjust your dose if needed.