Below are the general guidelines for dosing sildenafil. Note that these dosages may be adjusted on a case-by-case basis for individual patients by a provider. Always follow your prescribing physician’s instructions for taking sildenafil.
The following information comes from DailyMed, the official FDA label information provider for drugs.
What if I miss a dose of Sildenafil?
If you miss a dose of sildenafil, take it as soon as you can. If it’s almost time for your next dose, however, skip the missed dose and revert back to your regular schedule. Be sure not to double your doses. If prescribed for Erectile dysfunction follow directions from physician.
What if I overdose on Sildenafil?
In studies with healthy volunteers of single doses up to 800 mg, adverse events were similar to those seen at lower doses but rates and severities were increased.
In cases of overdose, standard supportive measures should be adopted as required. Renal dialysis is not expected to accelerate clearance as sildenafil is highly bound to plasma proteins and it is not eliminated in the urine.
How is Sildenafil administered?
The recommended dose of sildenafil tablets is 20 mg three times a day (TID). Administer sildenafil tablet doses 4-6 hours apart.
Dosages for Viagra for Erectile dysfunction should be with or without food 30 minutes – 4 hours before any sexual activity. (25 mg – 100 mg)
In the clinical trial, no greater efficacy was achieved with the use of higher doses. Treatment with doses higher than 20 mg TID is not recommended.