Sildenafil is used to treat erectile dysfunction in adult men or pulmonary arterial hypertension in adults and children, depending on the brand or formulation. Includes sildenafil side effects, interactions, and indications. Learn about the dosages of Viagra for treating erectile dysfunction (ED). You can also find information on the drug’s strengths, form, and more. Learn about the dosage of Viagra for erectile dysfunction (ED). You can also find information on the drug’s strengths, how to take it, and more. Viagra (sildenafil) is used to treat erectile dysfunction or impotence in men. Includes Viagra side effects, interactions and indications. Determine whether Viagra is the right choice for your symptomsViagra is used to treat problems relating to male sexual function, particularly problems concerning the ability to achieve and maintain an erection. Learn how to take Viagra. Viagra (sildenafil) is a brand-name prescription drug that’s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more. Medscape - Pulmonary hypertension, erectile dysfunction-specific dosing for Revatio, Viagra (sildenafil), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Sildenafil (Viagra) is a prescription medication that is usually prescribed in 25 mg, 50 mg, or 100 mg doses. Exceeding the dosage of sildenafil prescribed by your healthcare provider or taking it more than once within a 24-hour period can be considered too much sildenafil. If you take more than the recommended dose, you are more likely to have a side effect that could be serious, such as. Sildenafil is commonly prescribed for erectile dysfunction and pulmonary arterial hypertension, with dosage varying by condition and patient needs. Typical adult doses range from 25 mg to 100 mg for erectile dysfunction, taken about an hour before sexual activity. Learn more about Viagra, including its uses, interactions and risks, dosage, side effects, and how to get it.