It may take longer to work if you take it with food. Sildenafil dapat dikonsumsi sebelum atau sesudah makan. Its use is not studied in patients with severe hepatic impairment. You could also ask your pharmacist for advice on other ways to help you remember to take your medicine. Segera ke dokter jika Anda mengalami reaksi alergi obat atau efek samping serius setelah menggunakan Dosis dan Aturan Pakai Sildenafil Dokter akan memberikan dosis dan menentukan lama pengobatan sesuai dengan usia dan kondisi yang dialami pasien.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. Sildenafil is used to treat erectile dysfunction (ED) and to reduce blood pressure in pulmonary arterial hypertension (PAH). It is taken when needed for ED and daily for PAH. A headache, stomach upsets, and flushing are the main side effects, and it should not be taken within 24 hours of a nitrate. 5. Tips. Generic Viagra (sildenafil) is available as a , , , and milligram (mg) pill and in liquid form. It’s meant to be taken as needed — about an hour before sex — but shouldn’t be.