Reply To: Is smoking marijuana assur?

The Chofetz Chaim also writes about smoking.

See Zachor L’Miriam about halfway into Perek 23

http://hebrewbooks.org/pdfpager.aspx?req=14237&st=&pgnum=46

And Likutei Amarim about halfway into Perek 13

(Sorry, it’s not on hebrewboks.)