WHAT IS SILDENAFIL?
Sildenafil is the active ingredient in Viagra. Sildenafil, in doses ranging between 25mg and 100mg, has been FDA approved to treat erectile dysfunction.
Your physician, based on the information you share with them (including your preference and previous use of the medication), will recommend a starting dose. They can also work with you to increase or decrease your dose based on effectiveness and toleration (i.e., titrate your dose). This enables you to achieve the desired effect while taking the least amount of medication.
Sildenafil (Viagra), Cialis, and Levitra are part of a “family” of drugs called PDE-5 inhibitors. You can read more about how they work here.
HOW IT WORKS?
Sildenafil lasts up to 8 hours, which means it is in and out of your system faster than Cialis, which can last up to 36 hours. Some people prefer Sildenafil because if they experience side effects, even if minor, they would rather not experience them for up to 36 hours. On the other hand, some people prefer Cialis mainly because it lasts an extended period of time.
Another reason some people prefer Sildenafil, compared to Levitra, is because it has fewer conflicting medications and functions very similarly in terms of absorption.
It comes down to your personal preference and response to the medication. Please consult with your physician if you have any questions.
Here is a quick breakdown.