>>40182751sildenafil works quickly but its halflife is very short so it goes away out of your body quickly, you have about a 2 or 3 hour window to make use of it, it's also very strong and you can feel it like its a drug and will give you very powerful orgasms
ladyboy tops in thailand use big doses of sildenafil to get raging hardons even for the nasty old sexpat tourists they fuck in the ass, I used sildenafil to fuck gross old chinese women when I was whoring myself in china before covid and it let met perform. Good for being a manwhore/having lots of casual sex where you need to fuck on demand. It works fast, less than 10 minutes before you're in it.
Downside: SOMETIMES very difficult to reach orgasm, headaches, acid reflux
tadalafil sticks around in your body for a long time, several days even, and is more subtle but still very effective at powering up your boners. You cannot 'feel it' nearly as strongly as sildenafil, but you will get boners more easily and when you fuck they will be rock solid. Doesn't at least for me affect ability to cum. Good for having a girlfriend.
Downsides: not as enjoyable as sildenafil, no 'hot/flushed' increased libido sensation. Maybe a little acid reflux. Takes 2 hours to really start working, but is at its best many hours later.