My dad is an ex-serviceman. He was in the army. He is having a hard time readjusting to the life out of the military. He is affected by combat stress and pain caused by his memories. When nightmares and panic attacks became his daily routine I took him to a clinic in Toronto, where they offer medical marijuana services for PTSD symptoms and stress disorders. This is helping. I didn't think medical cannabis had this much effects in healing pain and stress. He is perfectly happy with the care and treatments. Although medical marijuana is pretty common in so many places, this is kind of new practice in our neighborhood. Everyone is enquiring about the other advantages and possible side effects by marijuana. My dad uses a vaporizer to inhale the medicated vapor. Could anyone explain about the other ways and methods to intake cannabis? He vomited the first time he inhaled cannabis. I contacted his physician and he said it is perfectly OK. What are the other likely symptoms he would experience? He doesn’t even smoke. This whole thing is new for him. Kindly share your first time experience and side effects from cannabis. Thank you.