Check with your doctor right away if you have a sudden decrease in hearing or loss of hearing, which may be accompanied by dizziness and ringing in the ears. If sildenafil is used to treat erectile dysfunction, an initial dose of 25 mg is recommended with concurrent itraconazole. Your doctor may adjust your dose as needed and tolerated. Doses for children can range from 10mg to 20mg taken 3 times a day, depending on their weight. When used for erectile dysfunction, starting adult dose should be reduced to 25 mg.For daily use, Goldstein said, the generic form, sildenafil, comes in mg tablets. “We prescribe one mg tablet a night, a classic dose,” he said. “Should they wish to have sex, they. Drug details Here are some details on sildenafil: Drug class: phosphodiesterase type 5 (PDE5) inhibitor Drug forms: oral tablet, liquid suspension, intravenous (IV) bolus . Want to see these pharmacies on a map and filter by available services? How much does sildenafil citrate or revatio cost near you? Find the best sildenafil citrate or revatio .