In my experience, whether it's 25mg/ 50mg or 80mg the time it lasts is the same (the quoted 3-4hrs). However i have still found that there is evidence i still have some still left in my system the next morning.
Dont know if that helps.
- Sildenafil Information for Consumers
- Sildenafil Information for Healthcare Professionals (includes dosage details)
- Side Effects of Sildenafil (detailed)
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