Medical Main short-term physical effects of<unk> Medical<unk>  or medical marijuana, refers to the use of<unk> to treat disease or improve symptoms; however, there is no single agreed-upon definition (e.g.,<unk> oids derived from<unk> and synthetic<unk> oids are also used). The rigorous scientific study of<unk> as a medicine has been hampered by production restrictions and by the fact that it is classified as an illegal drug by many governments. There is limited evidence suggesting<unk> can be used to reduce nausea and vomiting during chemotherapy, to improve appetite in people with HIV/AIDS, or to treat chronic pain and muscle spasms. Its use for other medical applications is insufficient for drawing conclusions about safety or efficacy. There is evidence supporting the use of<unk> or its derivatives in the treatment of chemotherapy-induced nausea and vomiting, neuropathic pain, and multiple sclerosis. Lower levels of evidence support its use for AIDS wasting syndrome, epilepsy, rheumatoid arthritis, and glaucoma. So far, the medical use of<unk> is legal only in a limited number of territories, including Canada, Belgium, Australia, the Netherlands, New Zealand, Spain, and many U.S. states. This usage generally requires a prescription, and distribution is usually done within a framework defined by local laws. Recreational Being under the effects of<unk> is usually referred to as being "high" or "stoned."<unk> consumption has both psychoactive and physiological effects. The "stoned" experience can vary widely, based (among other things) on the user's prior experience with<unk>  and the type of<unk> consumed. When smoking<unk>  a euphoriant effect can occur within minutes of smoking. Aside from a subjective change in perception and mood, the most common short-term physical and neurological effects include increased heart rate, increased appetite, impairment of short-term and working memory, and psychomotor coordination. Additional desired effects from consuming<unk> include relaxation, a general alteration of conscious perception, increased awareness of sensation, increased libido and distortions in the perception of time and space. At higher doses, effects can include altered body image, auditory and/or visual illusions, pseudohallucinations and ataxia from selective impairment of polysynaptic reflexes. In some cases,<unk> can lead to dissociative states such as depersonalization and derealization. Spiritual<unk> has held sacred status in several religions and has served as an entheogen – a chemical substance used in religious, shamanic, or spiritual contexts – in the Indian subcontinent since the Vedic period. The earliest known reports regarding the sacred status of<unk> in the Indian subcontinent come from the Atharva Veda, estimated to have been composed sometime around 1400 BCE. The Hindu god Shiva is described as a<unk> user, known as the "Lord of bhang. In modern culture, the spiritual use of<unk> has been spread by the disciples of the Rastafari movement who use<unk> as a sacrament and as an aid to meditation.
Cannabis 
Heroin
Cocaine
Cocaine 
Benzyl alcohol
Phencyclidine
Methamphetamine
Nicotine