Legal implications of drug use is a "loaded" question. It
depends on whether or not the drug is legal for use in society. If
the drug is "legal" AND prescribed by a physician licensed to
prescribe said "drug", and used ONLY by the patient to whom the
"drug" was prescribed, then there should be no LEGAL ramifications.
If, AND ONLY if the "drug" in question is listed as ILLEGAL for
consumption in society will legal ramifications occur. In other
words: If you are using MEDICATION (drugs) that are illegal to use,
or consuming Medication that has not been prescribed to you by a
licensed physician, ultimately you are breaking the law.