Hi.
First let me say that I sincerely hope this was not "recreational use". I can tell you from bitter personal experience that amphetamine abuse is one of the worse things you can do to yourself on many, many levels.
To your question, get some exercise, drink goodly amounts of water and wait a week to 10 days if you want to be sure your system has cleared the drug.
And, unless it was a Dr. that gave it to you, - DON'T DO IT AGAIN!
