You may instead apply to be paid by the Harvard College Research Program which funds during term time as well as over the summer: check the funding deadlines. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. Sildenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus HIV. Common side effects include headache, facial flushing, indigestion, and dizziness. Sildenafil may not be safe to take for people with certain medical conditions including: a past history of stroke or heart attack in the last 6 months retinitis pigmentosa an eye disease It can also interact with many other medicines, particularly nitrates used in heart disease , amyl nitrite and blood pressure medicines. Tell your doctor if sildenafil is not working well or if you are experiencing side effects.1. VED (Vacuum Erection Device) Often called a penile pump, a VED works by manually pulling blood into your penis using suction. Once the erection is formed, a tension ring is . 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. About sildenafil (Viagra) Sildenafil is a medicine used to treat erection problems (erectile dysfunction). Sildenafil is also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs). If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when.
