Forget dangers for your health, for your social life, for your job. Forget the risk of ending up prematurely aged and/or dead and/or in a dirty room and/or in jail.
The best reason to avoid becoming a drug addict (of any kind of “illegal” drug) is that State and society, including the Government, the vast majority of Parliamentarians, most Justices, a good many Police officers and an overwhelming number of fellow citizens will see you as a sub-human to mistreat and anyway deserving whatever comes your way.
Hence little practical help, zero understanding, zero tolerance, absurd jail terms, forced detox therapies, effective abandonement into the “careful” hands of drug dealers, and the risk of finding oneself without the necessary medicines and any chance to call one’s doctor, in case of arrest.
Perhaps that’s the unconscious goal of the War on Drugs that we have been losing for almost 40 years…the blackmail of being either a non-addicted good citizen, or treated as dung.