If you're taking it for medical reasons, can you get a medical prescription for it?
My view agrees with some others here - right or wrong (you won't get everyone to agree on that), it is illegal. You are now being held accountable for your actions, actions in which you engaged knowing the potential ramifications. You can disagree with the law and try to change it, which is part of the beauty of this country. However, as long as it is the law, it isn't wise to blatantly disobey it unless you are willing to suffer the consequences.