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CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its...
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Tetrahydrocannabinol (THC) is a phytocannabinoid that primarily interacts with the CB1 receptor, a type of G protein-coupled receptor (GPCR) predominantly in and around the chemoreceptor trigger zone (CTZ) and emetic center. THC also blocks the serotonin receptor activity in the dorsal vagal complex (DVC) by inhibiting serotonin release. THC exerts its anti-emetic effects through these interactions, which are beneficial for patients undergoing chemotherapy.
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Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
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Hallucinogens and Psychedelics01:27

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Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
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Drug Toxicity: Risk factors01:24

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Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
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Drug Abuse and Addiction: Pharmacological Phenomena01:15

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Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not...
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Related Experiment Video

Updated: Mar 8, 2026

Administration of Δ9-Tetrahydrocannabinol (THC) in Adolescent and Adult Mice
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Recreational cannabinoid use: The hazards behind the "high".

Steven Wright1, Julius Metts2

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Marijuana use poses significant risks, including physical, cognitive, and psychiatric impairments. These effects contribute to a near doubling of car accidents, highlighting public safety concerns.

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Area of Science:

  • Public Health
  • Neuroscience
  • Traffic Safety

Background:

  • Marijuana is a widely used substance with known psychoactive properties.
  • Understanding the full spectrum of marijuana's effects is crucial for public health and safety.
  • Previous research indicates potential impacts on various physiological and psychological functions.

Purpose of the Study:

  • To comprehensively review the adverse effects of marijuana use.
  • To assess the impact of marijuana on physical, psychomotor, cognitive, and psychiatric health.
  • To quantify the association between marijuana use and traffic accident risk.

Main Methods:

  • Systematic literature review of studies on marijuana's effects.
  • Analysis of data from epidemiological studies and clinical trials.
  • Meta-analysis of reported physical, psychomotor, cognitive, and psychiatric outcomes.
  • Examination of traffic accident data linked to marijuana impairment.

Main Results:

  • Marijuana use is associated with significant physical, psychomotor, cognitive, and psychiatric adverse effects.
  • Impairment in reaction time, coordination, and decision-making is consistently observed.
  • Studies indicate a substantial increase in the risk of motor vehicle accidents among marijuana users.
  • The magnitude of risk appears to be dose-dependent and influenced by various factors.

Conclusions:

  • Marijuana use presents a considerable public health concern due to its wide-ranging negative effects.
  • Impaired driving under the influence of marijuana significantly elevates accident risks.
  • Further research and public awareness campaigns are needed to mitigate these risks.