Nancy, next time you're in Bellaire,

Try this location for Berberine:

Super Health Food
(713) 270-8003 6650 Corporate Dr
Houston, TX

It's off of Bellair, half a block west, not far from Beltway 8

The only thing I suggest is: Don't discuss what you want it for, because they only know it is for diarrhea. It comes in a bottle of 100 pills for under $5... If you inform them, the price will probably go up considerably. Their English is poor, so ask for it by the Chinese name "huang lian su".....