It must be good for some people as they are prescribed cannabis.
& in contrast never heard of anyone being prescribed alcohol or tobacco.
Nobody is prescribed Cannabis, they are advised to smoke it by their GP.
And the reason they don't advise drink is that alcohol has been fully proven to be more harmful to the human body (and mind, for that matter) than cannabis.
pre·scribe(pr-skrb)
v. pre·scribed, pre·scrib·ing, pre·scribes
v.tr.
1. To set down as a rule or guide; enjoin. See Synonyms at dictate.
2. To order the use of (a medicine or other treatment).
Prett