There is no such thing as a forced decision. Everyone has complete control over their own body and their own decisions. Everyone has an absolute right to possession of one’s own body. If you own your body then you can choose what to do with it, and any exchange, such as money to an employer in exchange for use of your body (labour) is justified, because it was a voluntary exchange and you still possess yourself. If you choose to take drugs, you have not been forced into it no matter the peer pressure you may be under or that other having taken the drugs may make you uncompetitive.