Abstract or philosophical thinking, disruption of linear memory and paranoia or anxiety are also typical. Anxiety is the most commonly reported negative side effect of smoking marijuana. Between 20 and 30 percent of recreational users experience intense anxiety and/or panic attacks after smoking cannabis; however, some report anxiety only after not smoking cannabis for a prolonged period of time. Inexperience and use in an unfamiliar environment are major contributing factors to this anxiety. Cannabidiol (CBD), another cannabinoid found in cannabis in varying amounts, has been shown to ameliorate the adverse effects of THC, including anxiety, that some consumers experience.Cannabis produces many other subjective effects, including an increased enjoyment of food taste and aroma, and marked distortions in the perception of time (where experiencing a "rush" of ideas can create the subjective impression of much time passing). 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, cannabis can lead to acute psychosis and dissociative states such as depersonalization and derealization.Furthermore, even in those with no family history of psychosis, the administration of pure THC in clinical settings has been demonstrated to elicit transient psychotic symptoms. Any episode of acute psychosis that accompanies cannabis use usually abates after six hours, but in rare instances, heavy users may find the symptoms continuing for many days.
If the episode is accompanied by aggression or sedation, physical restraint may be necessary.While psychoactive drugs are typically categorized as stimulants, depressants, or hallucinogens, cannabis exhibits a mix of all of these effects, perhaps leaning more towards hallucinogenic or psychedelic properties, though with other effects quite pronounced. THC is considered the primary active component of the cannabis plant. Scientific studies have suggested that other cannabinoids like CBD may also play a significant role in its psychoactive effects. Somatic effects
Some of the short-term physical effects of cannabis use include increased heart rate, dry mouth, reddening of the eyes (congestion of the conjunctival blood vessels), a reduction in intra-ocular pressure, muscle relaxation and a sensation of cold or hot hands and feet and / or flushed face.Electroencephalography or EEG shows somewhat more persistent alpha waves of slightly lower frequency than usual. Cannabinoids produce a "marked depression of motor activity" via activation of neuronal cannabinoid receptors belonging to the CB1 subtype. Duration
Peak levels of cannabis-associated intoxication occur approximately 20 minutes after smoking it and last for several hours. Smoked
The total short-term duration of cannabis use when smoked depends on the potency, method of smoking – e.g. whether pure or in conjunction with tobacco – and how much is smoked. Peak levels of intoxication typically last an average of three to four hours. Oral
When taken orally (in the form of capsules, food, or drink), the psychoactive effects take longer to manifest and generally last longer, typically lasting for an average of four to six hours after consumption.