i wouldn't use any. these types of drugs were designed to be used by 80 year old men, not for younger guys. if you need an ED drug just to have sex you got a problem. you probably addicted to porn or you have heart issues
everyone is different.. i dont use often.. for whatever reason, ive preferred viagara, just a far better reaction to it but ive only used it for extra fun on certain occasions...
Depends on the person. If you go with Viagra keep in mind it is only to be used as needed before sex. With Cialis it is a bit more flexible. You can dose it daily so you are always ready to go. I have an article on evolutionary.org about all the PDE5 inhibitors.
If you dont mind me asking. How old are you?
Is this for recreational(xtra fun weekend) use or ED, or for bp.
Depends on the person and if you have any on going medical conditions. Medications, etc.