MJ is horrible stuff, really not worth the quick "feel good" and not really a healthy solution, despite it's popularity.

excerpt from http://www.braininjury.org.au/Causes...bis-fact-sheet

"Cannabis/Marijuana use after a Brain Injury
After acquired brain injury a person may become more sensitive to the effects of drugs including cannabis. After an acquired or traumatic brain injury it is recommended that cannabis be avoided. Some of the reasons, in addition to the above, include:

Cannabis use following Acquired Brain Injury can magnify existing effects of a brain injury including poor memory and attention, impulsivity and poor muscle coordination, speech difficulties.
Long-term use has lasting effects on memory and attention skills on top of damage already sustained through Acquired Brain Injury. These problems worsen the longer cannabis use continues.

Cannabis use can interfere with recovery and participation in community programs following an Acquired Brain Injury.
In a person with a brain injury cannabis use is more likely to produce adverse effects, including decline in memory, attention and confusion.

Smoking Cannabis may temporarily relax a person; however when the effects of cannabis have warned off a person is likely to experience higher anxiety levels and panic. Studies have indicated that long-term, heavy cannabis use causes brain damage that is equivalent to mild-traumatic brain injury or premature ageing [6]. Certain studies have also shown that parts of the brain involved in memory and emotion were smaller in heavy users [7]."


http://www.braininjury.org.au/Causes...bis-fact-sheet