NIDA InfoFacts: Inhalants (page 3)

Inhalants are a diverse group of volatile substances whose chemical vapors can be inhaled to produce psychoactive (mind-altering) effects. While other abused substances can be inhaled, the term “inhalants” is used to describe substances that are rarely, if ever, taken by any other route of administration. A variety of products common in the home and workplace contain substances that can be inhaled to get high; however, people do not typically think of these products (e.g., spray paints, glues, and cleaning fluids) as drugs because they were never intended to induce intoxicating effects. Yet young children and adolescents can easily obtain these extremely toxic substances, and are among those most likely to abuse them. In fact, more 8th graders have tried inhalants than any other illicit drug.¹

What Types of Products are Abused as Inhalants?

Inhalants fall into the following categories:

Volatile solvents—liquids that vaporize at room temperature

• Industrial or household products, including paint thinners or removers, degreasers, dry-cleaning fluids, gasoline, lighter fluid
• Art or office supply solvents, including correction fluids, felt-tip marker fluid, electronic contact cleaners, glue

Aerosols—sprays that contain propellants and solvents

• Household aerosol propellants in items such as spray paints, hair or deodorant sprays, fabric protector sprays, aerosol computer cleaning products, and vegetable oil sprays

Gases—found in household or commercial products and used as medical anesthetics

• Household or commercial products, including butane lighters and propane tanks, whipped cream aerosols or dispensers (whippets), and refrigerant gases
• Medical anesthetics, such as ether, chloroform, halothane, and nitrous oxide (“laughing gas”)

Nitrites—a special class of inhalants that are used primarily as sexual enhancers

• Organic nitrites are volatiles that include cyclohexyl, butyl, and amyl nitrites, commonly known as “poppers.” Amyl nitrite is still used in certain diagnostic medical procedures. When marketed for illicit use, they are often sold in small brown bottles labeled as “video head cleaner,” “room odorizer,” “leather cleaner,” or “liquid aroma.”

These various products contain a wide range of chemicals such as:

• toluene (spray paints, rubber cement, gasoline),
• chlorinated hydrocarbons (dry cleaning chemicals, correction fluids),
• hexane (glues, gasoline),
• benzene (gasoline),
• methylene chloride (varnish removers, paint thinners),
• butane (cigarette lighter refills, air fresheners), and
• nitrous oxide (whipped cream dispensers, gas cylinders).

Adolescents tend to abuse different products at different ages.² Among new users aged 12–15, the most commonly abused inhalants were glue, shoe polish, spray paints, gasoline, and lighter fluid. Among new users aged 16 or 17, the most commonly abused products were nitrous oxide or whippets. Nitrites are the class of inhalants most commonly abused by adults.³

How are Inhalants Abused?

Inhalants can be breathed in through the nose or mouth in a variety of ways, such as sniffing or snorting fumes from a container, spraying aerosols directly into the nose or mouth, or placing an inhalant-soaked rag in the mouth (“huffing”). Users may also inhale fumes from a balloon or a plastic or paper bag that contains an inhalant.

The intoxication produced by inhalants usually lasts just a few minutes; therefore, users often try to extend the “high” by continuing to inhale repeatedly over several hours.

How Do Inhalants Affect the Brain?

The effects of inhalants are similar to those of alcohol, including slurred speech, lack of coordination, euphoria, and dizziness. Inhalant abusers may also experience lightheadedness, hallucinations, and delusions. With repeated inhalations, many users feel less inhibited and less in control. Some may feel drowsy for several hours and experience a lingering headache. Chemicals found in different types of inhaled products may produce a variety of additional effects, such as confusion, nausea, or vomiting.

By displacing air in the lungs, inhalants deprive the body of oxygen, a condition known as hypoxia. Hypoxia can damage cells throughout the body, but the cells of the brain are especially sensitive to it. The symptoms of brain hypoxia vary according to which regions of the brain are affected: the hippocampus, for example, helps control memory, so someone who repeatedly uses inhalants may lose the ability to learn new things or may have a hard time carrying on simple conversations.

Long-term inhalant abuse can also break down myelin, a fatty tissue that surrounds and protects some nerve fibers. Myelin helps nerve fibers carry their messages quickly and efficiently, and when damaged can lead to muscle spasms and tremors or even permanent difficulty with basic actions like walking, bending, and talking.

Although not very common, addiction to inhalants can occur with repeated abuse. According to the 2006 Treatment Episode Dataset, inhalants were reported as the primary substance abused by less than 0.1 percent of all individuals admitted to substance abuse treatment.⁴ However, of those individuals who reported inhalants as their primary, secondary, or tertiary drug of abuse, nearly half were adolescents aged 12 to 17. This age group represents only 8 percent of total admissions to treatment.⁵

Other Information Sources

For additional information on inhalants, please refer to NIDA’s inhalant-specific website: www.inhalants.drugabuse.gov/

For a list of street terms used to refer to inhalants and other drugs, visit www.whitehousedrugpolicy.gov/streetterms/default.asp.

* These data are from the 2007 Monitoring the Future survey, funded by the National Institute on Drug Abuse, National Institutes of Health, DHHS, and conducted annually by the University of Michigan’s Institute for Social Research. The survey has tracked 12th graders’ illicit drug use and related attitudes since 1975; in 1991, 8th and 10th graders were added to the study. The latest data are online at www.drugabuse.gov.

** NSDUH (formerly known as the National Household Survey on Drug Abuse) is an annual survey of Americans age 12 and older conducted by the Substance Abuse and Mental Health Services Administration. Copies of the latest survey are available at www.samhsa.gov and from the National Clearinghouse for Alcohol and Drug Information at 800-729-6686.

1 Johnston LD, O'Malley PM, Bachman JG, Schulenberg JE. Monitoring the Future national survey results on drug use, 1975-2006. Volume I: Secondary school students (NIH Publication No. 07-6205). Bethesda, MD: National Institute on Drug Abuse. 2007.

2 Substance Abuse and Mental Health Services Administration, Office of Applied Studies. The NSDUH Report: Inhalant Use Across the Adolescent Years. Available at: http://www.oas.samhsa.gov/2k8/inhalants/inhalants.cfm. Accessed April 22, 2008.

3 Wu LT, Schlenger WE, Ringwalt CL. Use of nitrite inhalants (“poppers”) among American youth. J Adolesc Health 37:52–60, 2005.

4 Substance Abuse and Mental Health Services Administration, Office of Applied Studies. Treatment Episode Data Set (TEDS.) Highlights - 2006. National Admissions to Substance Abuse Treatment Services, DASIS Series S-40, DHHS Publication No. (SMA) 08-4313, Rockville, MD, 2008.

5 Substance Abuse and Mental Health Services Administration, Office of Applied Studies. (March 13, 2008). The DASIS Report: Adolescent Admissions Reporting Inhalants: 2006. Available at: http://www.oas.samhsa.gov/2k8/inhalantsTX/inhalantsTX.htm. Accessed April 22, 2008.