From the reading it has become clear that medical marijuana has become legal in most of the states in United States. Some states have also made it legal to use recreational marijuana. Now the case if marijuana use is like a double-edged sword. They are many benefits of marijuana if used for medical purpose. Bu when marijuana is used a drug then it can have a long-lasting negative effect. Due to the ban from the federal government the study of the effects of marijuana can also be not done and so a result there is no or little research to fall back on this subject. Marijuana is derived from the Cannabis plant.