The recommended starting dose of sildenafil for erectile dysfunction is 50 mg, taken as needed, about one hour before sexual activity.
Adjusting Your Sildenafil Dose
Your doctor may adjust your dose based on your response and any side effects. Possible adjustments include:
- Increased dose: If 50 mg is ineffective, your doctor might increase it to 100 mg. This is the maximum recommended dose. Decreased dose: If you experience significant side effects, your doctor may lower the dose to 25 mg.
The appropriate dose depends on individual factors, including your overall health, other medications you’re taking, and your age.
Sildenafil for Pulmonary Hypertension
For pulmonary arterial hypertension, the dosage is considerably different and prescribed by a specialist. It’s usually administered daily, at a significantly lower dosage than that for erectile dysfunction, beginning often at 20mg. Specific dosing instructions will be determined by your physician.
Always follow your doctor’s instructions precisely. Never exceed the prescribed dose. Do not take sildenafil more frequently than recommended. Report any side effects to your doctor immediately.
This information is for guidance only and does not replace professional medical advice. Consult your doctor before starting or changing your sildenafil dosage.


