No.
If a teacher were to do a a few weeks of study of On The Road s/he could point out all the physical problems suffered by Kerouac (phlebitis, etc) and his contemporaries as well as mention how he, Neal Cassady, and others died young, painful, drug/alcohol-related deaths. The writing and lives of Kerouac etc provide a far better reason to not get too far into drug use than any dumbass PSA or high school health class. Even more of use for this particular lesson would be the writings of William Burroughs.
And, besides, Kerouac took several years re-writing and editing On The Road after his initial coffee-fueled (he denied drug use during the famous writing explosion) effort.