Heh.
Yeah, the L-arginine has been known to work - but like all this stuff it doesnt work for everyone so YMMV. Try adding in Pycnogenol (pine tree bark, believe it or not) with it (50 mg caps and GNC has it) to see if it improves things even more or maybe gets l-arg to work when it doesnt do anything on its own.
Never heard of Power Zen. I'll have to look into it. If it contains Yohimbe and L-Arg, then it isnt much of a surprise that it can help too. Older men and men with blood pressure and heart issues need to be extra careful with any/all of this stuff!
Yes, the supp manufacturers have been know to slip the active ingredients from V, C, or L (sildenafil, tadalafil, and vardenafil) into their products. Ozzy is right on the money there.
Side effects from V, C, and L vary from man to man. One guy can take V and get no sides but will get a backache from C (I still think it's from all the pelvic thrusting and not the C, lol), so it isnt possible to know what sides, if any, you will get until you try them.
There's another one I've heard of but havent tried called KABOOM. Google around and you can buy it on the internet. I've seen the list of ingredients: fenugreek extract, red ginseng, and (you guessed it) L-arginine. It's a melt strip you put under your tongue. It's also expensive...might be cheaper to find the least expensive l-arginine you can find and just go with that....