Marijuana or Cannabis is an extravagance in the teenage over potato chips. Tetrahydrocannabinol (THC), an active component of cannabis has some medicinal effects. Cannabis contains more than 60 psychoactive compounds.

An Irish Physician, conducted a cannabis experiment in 1830, and used it to treat muscle spasms, stomach cramps and general pain. Then cannabis started using for medicinal purpose throughout the West.

China was being refined marijuana by 6,000 BC; it used as medicine around 3,000 BC in China. After 2,000 years of cultivation the drug used to make textiles in China.

Marijuana has been used as a medicine in India, China, the Middle East, Southeast Asia, South Africa, and South America.

It increases appetite and also helps in the treatments of eating disorders. The component THC prevents vomiting, and hence useful to treat patients receiving chemotherapy. It can be used to treat many other diseases including multiple sclerosis.

Marijuana was offered for the first time by Canada in July 2001. Currently, there are around 4,000 people in Health Canada's Marijuana Medical Access Regulations (MMAR) program.

US Supreme Court has allowed that government has right to regulate and criminalize cannabis, even for the medical purposes.