Is not a good idea.

Wikipedia entry say "A study has shown that holding cannabis smoke in one's lungs for longer periods of time does not conclusively increase THC's effects."

and here's the citation they give for that info: "Block RI, Farinpour R & Braverman K. (1992). "Acute effects of marijuana on cognition: relationships to chronic effects and smoking techniques". Pharmacology Biochemistry and Behaviour 43(3): 907 â?? 917."

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http://www.ncbi.nlm.nih.gov/entrez/q...&dopt=Abstract

"There were a few hints that prolonged breath holding increased marijuana's effects under some test conditions, but in general it did not. Prolonged breath holding itself affected performance in four tests, regardless of whether subjects smoked marijuana or placebo. Whether physiological or psychological factors (e.g., exposure to carbon monoxide in smoke or subjects' expectations) produced these effects could not be determined."

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http://www.schmoo.co.uk/thclub/methods.htm

"Recent research shows the opposite; it causes more harm to the lungs without increasing the amount of THC absorbed. Studies done in Australia indicate that 95% of the THC in cannabis is absorbed in the first few seconds of inhaling. Holding in the smoke longer just allows more tar and other noxious chemicals to be absorbed. Take small, shallow puffs rather than deep inhalations."
Jaycub Reviewed by Jaycub on . Holding large hits: Is not a good idea. Wikipedia entry say "A study has shown that holding cannabis smoke in one's lungs for longer periods of time does not conclusively increase THC's effects." and here's the citation they give for that info: "Block RI, Farinpour R & Braverman K. (1992). "Acute effects of marijuana on cognition: relationships to chronic effects and smoking techniques". Pharmacology Biochemistry and Behaviour 43(3): 907 â?? 917." ------------------------ Rating: 5