The best way to improve performance is arobic exercise. Get the heart healthy and stamina will increase. Herbals do little and they work best on healthy bodies. I know of some bodybuilders who get injections from Boston Medical (steriods). They can help but cary risks and a huge cost.Like a grand a month. Antidepresants are also used to treat premature pops but can make it very difficult to climax at all if that's not your problem. My advice is start walking. In a few weeks you will be suprised at the improvements that come with exercise. I know that's a bad word to some but there are no better drugs than endorfrens(sp) . The bodys natural reward for doing something healthy. Check your risks first. If you are over weight or a smoker and drinker see a Doctor first for a stress test.As you progress you can walk faster or Up Hill. I do 5 miles in just over an hour on uneven ground. You would be suprised to know that it improves your outlook on life, gives you more energy.improves skin tone, muscle tone and even makes sex better.It may add years to your hobby life.... try it.

I don't know of anything that can actually increase how long you last other than mental/physical control.

Viagra, etc. can reduce the time to get another erection after ejaculation.

Yohimbine supposedly does something for some people. Personally, it mostly seems to just make me jittery and slightly nauseas.

As far as the rest of the "herbal" stuff it might have a placebo effect but that's about it.  People will believe and buy almost anything if they want something bad enough.

5 pops or more?  You can quit smoking, quit drinking, eat healthy, exercise, and it will all help.  But nothing that comes in a pill will make you 18 years old again.