Over-the-counter (OTC) medicines are those that can be sold directly to people without a prescription. OTC medicines treat a variety of illnesses and their symptoms including pain, coughs and colds, diarrhea, constipation, acne, and others. Some OTC medicines have active ingredients with the potential for misuse at higher-than-recommended dosages. Read the DrugFacts
- Emerging Trends - "Sizzurp", "Purple Drank"
- Over-the-Counter Medicines—Dextromethorphan (DMX) Health Effects
- Over-the-Counter Medicines—Loperamide Health Effects
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|Drug||Time Period||8th Graders||10th Graders||12th Graders|
|Cough Medicine (non-prescription)||Past Year||2.80||3.30||3.40|
- MedlinePlus - Drug Use and Addiction - National Library of Medicine, NIH
- Above the Influence - Office of National Drug Control Policy
- Healthfinder.gov - U.S. Department of Health and Human Services
Past information is available on our Archives site.
Clinical trials are research studies in human volunteers conducted to answer specific health questions. Learn about the NIH-sponsored clinical trials available to you.
- NIDA Clinical Trial Locator - answer a few simple questions and get contact information for Clinical Trials near you.
Other Clinical Trials information sources:
- NIH Clinical Trials and You - NIH site that helps explain about clinical trials and why people participate.
- NIDA Trials at ClinicalTrials.gov - a resource of federally and privately supported clinical trials.
- Clinical Research Studies from the National Drug Abuse Treatment Clinical Trials Network (CTN) - a NIDA coordinated network of research institutions conducting human trials on drug use solutions.
- Research Studies at NIDA Intramural Research Program - located in Baltimore, Maryland.
Emerging Trends & Alerts
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NIDA. (). Over-the-Counter Medicines. Retrieved from https://www.drugabuse.gov/drugs-abuse/over-counter-medicines
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