Cannabis

Cannabis can induce euphoria as much as it can relax a person; it alters the perception of the senses considerably and increases sexual desire.

Consuming cannabis regularly can cause concentration problems and psychological problems such as anxiety and psychosis. It is possible to become psychologically addicted to cannabis and physically addicted when it is consumed over long periods.

Cannabis, however, can also have therapeutic effects. Some people with HIV use it to stimulate the appetite or as a painkiller. The agent THC can even be prescribed in the form of the medication Marinol, though the health insurance will not cover the costs.