Your profile is private so posting here.
If it is smoking related, may I strongly recommend that you source a vaping tank w/ coils, mod, 18650 batteries, battery charger (or a convenient usb charged vape kit like this:
https://epuffer.co.uk/titan-hybrid-vapourizer.html) and good quality e-liquid (0.6mg nicotine for large vapour kits that heavy smokers generally prefer) ... if he won't quit smoking, get him on this as it is basically vaping food grade glycerine (no tar and other chemicals associated with smoking). I shifted to this after nearly 20+yrs of smoking and it has made a huge difference in health. Kicking the habit itself is very tough for some so replace with what's far less dangerous, as a last resort.
let me know if I can be of an assistance in any way. best buddy is going to PK in coming weeks and I can send all that's needed.
Wishing him a speedy recovery.