Illicit drugs are drugs that are illegal to have or use. They include illegal and controlled drugs that are used and misused. The non-medical use of drugs that are legally available is also considered illicit drug use. Examples of illicit drugs include:

• Marijuana
• Cocaine (including crack)
• Heroin
• Hallucinogens
• Inhalants
• Methamphetamine
• Prescription psychotherapeutic drugs that are misused, such as pain relievers, tranquilizers, stimulants, and sedatives

Illicit drug use can cause a range of problems, including addiction, drugged driving, infectious disease, and adverse effects on pregnancy. Using street drugs during pregnancy can cause problems for both the mother and the baby, such as neonatal abstinence syndrome (NAS). It is important to seek treatment from a healthcare provider or a drug treatment center if you are struggling with illicit drug use.