Just want to ask one simple question here before I agree with the other opinions. Are you bringing a few with you, or are you bringing a bag of 1000 with you. Be careful of the amount you're bringing with you for one simple reason...
If its an amount greater than what they will believe is personal, they may arrest you for trying to traffic a prescription drug, and if you dont believe this has ever happened, be aware that it has. It just happened last yr to a young chinese man who tried to bring a fairly large amount of Viagra through Pearson International Airport.
Just make sure its roughly the amount of what a normal script would be.
good luck.