Gateway Drugs: Meaning, Examples, and Why Prevention Matters

This article is intended for education. It is not medical advice, and does not substitute for the care of licensed healthcare providers.

What Is a Gateway Drug?

Gateway drugs have remained a common topic within public consciousness and a frequent point of discussion around drug use and public health for decades. A gateway drug is generally defined as a drug whose use increases the probability that a person will use more harmful or addictive drugs in the future [1]. The definition of a gateway drug is not about the biologic effects of the drug on the body; it’s about what tends to happen behaviorally and statistically.

Dr. Denise Kandel, through her extensive epidemiological research beginning in the 1970s, provided evidence that advanced the concept of gateway drugs into what is now widely known as the gateway theory.[2] Most notably, Kandel documented a clear and consistent pattern in the sequence in which drugs are used, specifically that in most cases people who went on to use more harmful drugs had first used alcohol, marijuana, or tobacco.[3]

The gateway theory does not suggest that everyone who uses alcohol or marijuana will inevitably progress to more dangerous substances. Rather, it identifies statistical patterns showing that people who exhibit certain risk factors or use patterns with alcohol, tobacco, or marijuana may have a higher probability of progressing to the use of more harmful or addictive drugs.[4]

What Are Common Gateway Drugs?

Alcohol

One of the most common substances considered to be a gateway drug is alcohol. This is primarily due to the fact that alcohol is legal, socially acceptable, and easily accessible. Research from the National Institutes of Health (NIH) found that alcohol is most often the first mood-altering substance that youth consume, and there are well-established links between early alcohol use and a greater chance of becoming addicted to alcohol and using illicit drugs later in life.[5]

According to the Centers for Disease Control and Prevention (CDC), underage drinking is a serious public health concern in the United States. Many studies indicate that people who start drinking prior to age 15 are anywhere from 4-5 times more likely to develop alcohol dependence than individuals who start drinking after the age of 21.[6] The earlier the initiation, the greater the risk of the individual eventually developing an alcohol use disorder.

Tobacco

Tobacco in any form, including vaping products, has been identified as a gateway drug. Nicotine is one of the most addictive substances, and research studies show that youth and adolescents who smoke and vape are more likely than those who do not to use other illicit substances in the future.[7]

Vaping has accelerated the concern for youth and adolescents using nicotine. According to the CDC, there has been an increase in vaping among adolescents and young adults, with many young people using vaping as their first introduction into nicotine or cannabis, due to ease of concealment and a wide range of flavors.[8]

Marijuana

Marijuana is a well-known example of a gateway drug validated by research. This has come up in much public discussion, especially since many states in the US are now decriminalizing or legalizing cannabis.

According to research from NIDA, people who use marijuana are more likely to use other illicit drugs than those who don’t. Research indicates that of those who try marijuana, only about 9% will become addicted to it, but this percentage increases if the person starts using marijuana during adolescence.[9] It was also noted in NIDA research that if a person uses marijuana early in life, they are at a greater risk of progressing to more harmful or addictive drugs.

There are, however, many researchers who also point to social and environmental factors that can contribute to this progression. Growing up in an environment where both marijuana and more harmful drugs are prevalent can expose young people to social networks that will lead them to use more harmful and addictive drugs, independent of any direct effects the drugs may have on their brains.

Prescription Drugs

Prescription medications, particularly opioids, benzodiazepines, and stimulants, are also a growing category of gateway drugs. When misused, prescription drugs can be very addictive and serve as a gateway to the use of illicit drugs. According to NIDA, many people who develop opioid use disorder began by misusing prescription painkillers prior to transitioning to heroin or illicit fentanyl, often because the prescription drugs became too expensive or difficult to obtain.[10]

The misuse of prescription stimulants has similarly been associated with a higher risk of other substance abuse among young adults, making this an additional concern.[11]

Why Are Adolescents and Young Adults at Higher Risk?

Adolescents and young adults are at greater risk of escalating substance use in part because their brains are still developing. The brain does not reach full maturity until approximately age 25, making it more vulnerable to the effects of drugs during this period.

According to research by the National Institutes of Health, adolescent drug use can impede normal brain development and adversely affect parts of the brain responsible for decision-making, impulse control, and reward processing.[12] These changes create an increased likelihood of developing an addiction to alcohol or other drugs once someone has begun using these substances.

Many social factors also increase the risk of adolescent substance use. Peer pressure, mental health problems such as depression and anxiety, family history of substance use, and trauma can all increase the chances that a young person will initiate drug use. Addressing the underlying causes of substance use is vital to effective prevention strategy development.

The Debate Around Gateway Theory

While the gateway hypothesis has been influential in forming drug education and public health policy, it also has its share of critics. Some researchers maintain that the correlation between early drug use and using more harmful drugs later in life might reflect common risk factors such as genetics, environmental influences, and mental health, as opposed to one drug directly influencing subsequent drug use.

Regardless of where one stands on the gateway theory, most public health practitioners agree that early use of any substance presents a particular risk for developing a substance use disorder. This highlights the importance of prevention and early intervention regardless of one’s beliefs about gateway theory.

Prevention and Education: Why They Matter

Evidence-based prevention programs that focus on educating youth about the risks of drug and alcohol use, developing coping skills, and reinforcing family and community structures that support drug-free environments, have been shown to meaningfully reduce the number of young people who begin using mood-altering substances.

There are a number of effective prevention strategies, including education programs in schools, collaborating with families to have open discussions about drugs and alcohol, providing proper mental health support to youth suffering from anxiety, depression, or trauma, and developing community programs designed to limit youth access to alcohol, tobacco, and other drugs.

Both the CDC and NIDA emphasize that prevention programs are most successful when introduced before a youth begins using substances and when they address all of the different risk factors, rather than simply targeting any one class of substances.[13]

Getting Help for Substance Use in New Jersey

Whether your substance use has just started or has progressed to a more serious situation, having professional support to eliminate drug use can make a meaningful difference.

New Jersey Behavioral Health offers outpatient treatment programs for anyone with a substance use disorder or co-occurring mental health conditions. Get started today and take the first step toward a healthier life.