Comparison Group: Find a research study

NIDA relies on comparison groups to find out how certain drugs affect the body and brain. Some of our comparison groups are made up of volunteers who do not use drugs of any kind, including nicotine-these study participants will not be exposed to any illicit drugs. Other comparison groups may be made up of volunteers who do use some types of drugs, including nicotine-these study participants may be exposed to nicotine or study medications under medical supervision and in accordance with strict research guidelines.

If you are in generally good health, you may be able to join one of our research studies. It's free to join, and you will be paid for your time and travel.

The following studies are active and currently enrolling participants. If you're interested, please take a moment to contact us and learn more about studies that are going on now.

Study Description
Study Number
How Genes Influence Substance Abuse
Brain Imaging Study of the Effects of Nicotine on Thinking, Feeling, and Memory
Advanced Brain Imaging Techniques
Brain Imaging Study of Cocaine Addiction
How Genes Affect the Brain
How Nicotine Affects a Person’s Attention
The Effects of Smoking on the Brain
The Effects of Sativex® and THC on Attention, Thinking, Feeling, and Memory


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