Cannabis, commonly known as marijuana and by numerous other names, is a preparation of the Cannabis plant intended for use as a psychoactive drug and as medicine. Pharmacologically, the principal psychoactive constituent of cannabis is tetrahydrocannabinol (THC); it is one of 483 known compounds in the plant, including at least 84 other cannabinoids, such as cannabidiol (CBD), cannabinol (CBN), tetrahydrocannabivarin (THCV), and cannabigerol (CBG). Cannabis is often consumed for its psychoactive and physiological effects, which can include heightened mood or euphoria, relaxation, and an increase in appetite.
Modern uses of cannabis are as a recreational or medicinal drug, and as part of religious or spiritual rites; the earliest recorded uses date from the 3rd millennium BC. Since the early 20th century cannabis has been subject to legal restrictions with the possession, use, and sale of cannabis preparations containing psychoactive cannabinoids currently illegal in most countries of the world; the United Nations deems it the most-used illicit drug in the world. The UNODC estimated that approximately 3.8% of the world population aged 15-64 (178 million people) used cannabis in 2012. A survey conducted in March 2015 has shown that 49% of Americans have tried marijuana, 12% have used it in the past year and 7.3% have used it in the past month.
The licensed state physicians who are available for consultation as medical cannabis specialists.
"Marijuana", or "marihuana", etc., is a name for the cannabis plant and a drug preparation made from it. The form "marihuana" is first attested in Mexican Spanish; it then spread to other varieties of Spanish and to English, French, and other languages. The word entered English usage in the late 19th century. According to the Oxford English Dictionary, the first known appearance of a form of the word in English is in Hubert Howe Bancroft's 1873 The Native Races of the Pacific States of North America. Other early variants include "marihuma" first recorded in 1905, "marihuano" in 1912, and "marahuana" in 1914. Through the early 20th century, however, both the drug and the plant were more commonly known as "cannabis" or "hemp". "Marihuana"'s currency in American English increased dramatically in the 1930s, when it was preferred as an exotic-sounding alternative name during the debates of the drug's use. It has been suggested that it was promoted by opponents of the drug, who wanted to stigmatize it with a "foreign-sounding name".
A vaporizer or vaporiser is a device used to vaporize the active ingredients of plant material, commonly cannabis, tobacco, or other herbs or blends for the purpose of inhalation. However, they can be used with pure chemicals when mixed with plant material (e.g. tobacco-free nicotine).
Studies have shown that vaporizing cannabis exposes the user to lower levels of harmful substances than smoking cannabis. These findings are important for it is estimated that 10–20 percent of patients with chronic pain, multiple sclerosis, epilepsy, and HIV/AIDS have admitted to smoking cannabis for therapeutic purposes. For patients, a study found that smoking cannabis sativa reduced daily pain by 34%, a statistically significant amount. In a study published in the Journal of Psychopharmacology in May 2008, it was stated that vaporizers were a "suitable method for the administration of THC. "A 2007 study by University of California, San Francisco, published in the Journal of the American Academy of Neurology, founded that "there was virtually no exposure to harmful combustion products using the vaporizing device. "A 2006 study performed by researchers at Leiden University found that vaporizers were "safe and effective cannabinoid delivery system(s)." The study stated that the amount of THC delivered by vaporizers were equivalent to the amount delivered by smoking. Because of those studies and other studies, vaporizers are medically sound devices for delivering THC.