Chinese herbs for impotence?

I go to a local Chinese acupuncturist for my migraines, insomnia and mild impotence. His treatments definitely do help with all three of these conditions. For my impotence he started giving me some yellow/red capsules to take as needed. After taking them for a couple of days all I can say is Wow! This stuff really does work. I've heard of Chinese Viagra and I'm not sure if that is what these are. The come in a plastic sheet of four individual pills sealed with foil. Most of the wording on the packaging is in Chinese. The only English I can read says, "V-can. 300mg". I would like to get these pills on my own as he charges $8 for each sheet of four. Using Google I just can't find anything at all on them. Any thoughts or suggestions would be appreciated.

[gymdandee]

Try Horny Goat Weed

[FriendOfJah]

I've tried Horny Goat Weed, and it does nothing for me at all. These pills I got from my acupuncturist really work, just like Viagra.