WebJun 14, · Still, if your doctor says it’s okay for you to use and you end up paying out .Sexual activity may be a strain on your heart, especially if you have heart disease. Shake the liquid well for 10 seconds before each use to mix the medication evenly. If you experience a sudden loss of vision in one or both eyes, contact your doctor immediately. Sildenafil should not be used with any other medicine or device that causes erections. 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. Do not take more or less of it or take it more often than prescribed by your doctor.AdFree & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped Discreetly. Save Time & Money and Get Your ED Meds Prescription & Refills Online. Discreet Shipping · Personalized Plan · Discreet Packaging · Real DoctorsTypes: Genital Herpes · Sertraline · Testosterone · Erectile Dysfunction. WebJun 14, · Still, if your doctor says it’s okay for you to use and you end up paying out . WebJul 12, · Viagra (sildenafil) is a prescription drug that’s used to treat erectile dysfunction (ED). The drug comes as a tablet you’ll take by swallowing. It’s usually taken as needed about 1 hour.Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. Side Effects Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Children 1 year of age and older weighing 20 to 45 kg—20 mg 3 times a day. Different brands may not work the same way.