It has been a long drawn out argument on whether Cannabis actually has medicinal purposes and if the benefits outweigh the potential for harm. Scientific studies have shown that the greatest advantage of Marijuana is pain control and people who are in pain do not care about disadvantages; they just want to get rid of it.
It has also been used to treat asthma and seizures brought about by Epilepsy. The usual side effects are dependency to the substance and emotional stress. It is still up to the doctor to advice whether it is safe to use Marijuana as part of treatment and up to the patient to decide if it’s worth the price.