Younger drinkers (aged 18–29) were at significantly higher risk of any cannabis use than those 30–49 or 50+, though age does not appear to differentiate concurrent from simultaneous users. Relative to Whites, Hispanics had less risk of any cannabis use (vs. alcohol only), while African Americans had higher risk of concurrent use (vs. alcohol only). Thus, distinct demographic factors appeared to relate to what kinds of drinkers are likely to use cannabis with alcohol.
Cannabis sativa, also known as hemp, is a species of the Cannabinaceae family of plants. Martin CS, Kaczynski NA, Maisto SA, Tarter RE. Polydrug use in adolescent drinkers with and without DSM-IV alcohol abuse and dependence.
The effects of inhaled cannabis are felt within minutes, reach their peak in 10 to 30 minutes, and may linger for two or three hours. However, edible cannabis, which may contain higher amount of THC, can take a longer period of time to reach full effect as it must be absorbed from the gastrointestinal tract.
Liguori A, Gatto CP, Jarrett DB. Separate and combined effects of marijuana and alcohol on mood, equilibrium and simulated driving. Chait LD, Perry JL. Acute and residual effects of alcohol and marijuana, alone and in combination, on mood and performance.
Per federal law, cannabis is illegal and a schedule 1 substance as noted in the U.S. Use of medical marijuana outside of the state laws for illegal use or trafficking will not be tolerated by state or federal government.
Related to simultaneous and concurrent use are the concepts of substitution and complementarity. Studies of complementarity and substitution come from varying disciplines, each with its own jargon.
Alcohol will increase dizziness, drowsiness, and impaired judgment. While cannabis (marijuana) remains a federal DEA Schedule 1 controlled substance, research has resulted in development and marketing of medications which are synthetic prescription cannabinoid products.
Conversely, if increasing the price of alcohol decreases the demand for cannabis, then the two would be economic complements. On the other hand, clinical studies generally focus on actual substance use, defining substitution as increased use of one substance when decreasing the use of the other.
The clinical definition of complementarity would thus be increased use of one substance if use of the other substance is also increased. The dichotomy of substitution/complementarity may also be too limited; a spectrum of co-use patterns likely exists. Cannabis use was more prevalent among younger drinkers (aged 18–29) than those 30–49 or hemp oil for pain 50+, as well as among African Americans (vs. other races), and unmarried/un-partnered individuals (vs. married/partnered).