All other men with erectile dysfunction who wish to have treatment with medicines other than generic sildenafil will need to be prescribed treatment by their GP on a private prescription. Common ones include: Flushing of the skin. Take sildenafil up to 4 hours before you want to have sex. If you have an erection that lasts more than 4 hours, get medical help right away. The cost of a private prescription is met wholly by the patient and is dictated by the cost of the medicine plus the pharmacist’s charge for supplying it. These are commonly prescribed for an enlarged prostate or male pattern baldness.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. VIAGRA is available by prescription only in 25 mg, 50 mg, and mg tablets. Patients should always ask their doctors for medical advice about adverse events. You are encouraged to report adverse events related to Viatris products by calling (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA. 2 days ago · If you’re prescribed Viagra, you can purchase it in doses of 25, 50, or milligrams (mg). Hims recommends taking Viagra anywhere from 30 minutes to 4 hours before sexual activity.

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