Anxiety, depression and IBS. As a sufferer of all 3, and someone who has smoked weed every day, on and off over a period of 10 years, and who has been on anti depressants/anxieties I can tell you that weed not only works 1000x better than prescription drugs but the side effects are nothing by comparison. Also, weed cures IBS as long as it's in your system. Prescription and over the counter drugs only help with the side effects. That said, it might not work for everyone. I read a study last week saying the above disorders, as well as asthma and a few others I forget, are in some cases caused by an endocannibinoid deficiency. Effectively, your body doesn't produce enough of its own THC-like chemicals. So in my case at least it works.