There is no enumerated Constitutional right to drug abuse.
Common mistake made by those who don't understand the document they quote nor the thoughts of our Founders on listing a few of the Citizen's Rights.
The Constitution doesn't limit the RIGHTS of Citizens, it limits the Federal Government primarily and the States is some part. Several Founders thought listing a few basic ones would have yahoos in later years claiming they were the only Rights Citizens have. It seems to be an attempt to limit a Citizens Rights in areas the CONs don't endorse to try and claim if it isn't spelled out in the Constitution it doesn't exist.
Next the 10th Amendment was a stroke of genius, the Founders knew times would change and a way to acknowledge this was needed.
Under the 10th A there should never be a need to create an amendment to ACKNOWLEDGE Citizen Rights, such as women voting, slaves as citizens, gays as equal in marriage and the law, but rather anything that limits Citizen Rights, such as Prohibition, MUST be an amendment.
But just because the Constitution doesn't list each and every Right a Citizen holds doesn't mean the Right doesn't exist.
Just my take on the War on Drugs- it is UnConstitutional. Equal treatment under the law. Cigarettes and alcohol are regulated, their use all by itself is not a crime. Cause harm while under the influence of alcohol and there are penalties. Alcohol is addictive, cigarettes are addictive, both cause bodily harm with even moderate use.
Drugs should be regulated and penalties by the Government should focus on actions that harm while under the influence.
If it doesn't pick my pocket or break my leg....
eace