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Cannabis flower is commonly consumed using a dry herb vaporizer. The cannabis may be heated in a chamber via indirect flame exposure or an electrical heating element, allowing users to inhale the resulting vapor. The temperatures reached are cooler than the combustion temperature of cannabis, which is around 230–315 °C (445–600 °F). [9]
Cannabinoid hyperemesis syndrome (CHS) is recurrent nausea, vomiting, and cramping abdominal pain that can occur due to prolonged, high-dose cannabis use. [4] [5]CHS is associated with frequent (weekly or more often), long-term (several months or longer) cannabis use; synthetic cannabinoids can also cause CHS.
These are achieved at lower doses, because many synthetic cannabinoids are more potent than marijuana, and users are often unaware of exactly what they are getting and how potent it is. [62] For example, Δ 9-THC has an EC 50 of 250 nM at CB 1 and 1157 nM at CB 2, whereas PB-22 has an EC 50 of 5.1 nM at CB 1 and 37 nM at CB 2. [8]
CBD heated to 175, [13] or 250–300 °C may partially be converted into THC. [14] Even at room temperature, trace amounts of THC can be formed as a contaminant in CBD stored for long periods in the presence of moisture and carbon dioxide in the air, with storage under inert gas required to maintain analytically pure CBD.
Δ-8-tetrahydrocannabinol (delta-8-THC, [a] Δ 8-THC) is a psychoactive cannabinoid found in the cannabis plant. [1] It is an isomer of delta-9-tetrahydrocannabinol (delta-9-THC, Δ 9-THC), the compound commonly known as THC, with which it co-occurs in hemp; natural quantities of ∆ 8-THC found in hemp are low.
The Pax 2 vaporizer uses loose plant material such as tobacco or cannabis and remains cool to the touch while the oven heats to one of four temperatures (up to 455 °F). [124] [125] The Pax 3 takes 15 seconds to heat up and can be used to heat cannabis flowers. [126]
While dronabinol was initially approved by the United States Food and Drug Administration (FDA) on May 31, 1985, [21] it was not until May 13, 1986, the Drug Enforcement Administration (DEA), issued a Final Rule and Statement of Policy authorizing the "rescheduling of synthetic dronabinol in sesame oil and encapsulated in soft gelatin capsules from Schedule I to Schedule II" (DEA 51 FR 17476-78).
At room temperature, cannabidiol is a colorless crystalline solid. [75] In strongly basic media and the presence of air, it is oxidized to cannabinodiol (CBND) and a quinone called HU-331. [76] Under acidic conditions it cyclizes to THC, [77] which also occurs during pyrolysis, [78] and during smoking.