with your lung issues i would suggest using cannabis in other ways other than smoking. I've found that marijuana is alot more therapeutic when taken orally(food or drink) Marijuana tincture is a highly effective concentrate that uses vegetable glycerin to soak up the precious cannabinoids that you seek. Beware when taking medicated foods, drinks, and pills(marijuana of course)..........start small and work your way up. That way you eliminate the chance of taking wayyyyy to much, its not a fun feeling. You will feel the effects for a good 5-8 hours if potent enough, but the high seems to effect the body more than inhaling the smoke. Great for relieving pain. Happy medicating its only the safest medicine on earth with over 4,000 years of documented human consumption without a single death.

if you have any questions about preperation of medicinal cannabis concentrates just ask. I Go through quite a bit of trim from my plants so im always making hash, tinctures, butter, oil, lotions, you name it. Concentrates are my thing, my tolerance has gotten so high i can't afford an 80$ a day when my harvest goes dry.