Answer:
Some negative consequences of cannabis is addiction, which, in a way, is most common. This could effect their social life as well too. Nausea, vomiting which leads to weight loss most commonly with people with HIV, diabetes, and AIDS. Which also leads to appetite loss muscle spasms, chronic pains. Not very commonly, but could cause seizures. Most common effects are headaches, dry mouth and dry eyes, light-head-edness and dizziness, drowsiness, fatigue, nausea and vomiting, disorientation, hallucinations, increased heart rate, and much more.
Hope this helps!