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MinorEligibility criteria expanded, about 50 words
Minor9 versionsRe-verified since Jul 22, 2026, no change to tracked fieldsv669-v677
NotablePrimary and study completion pushed from Dec 31, 2026 to Dec 31, 2028Enrollment increased: 70 → 95 participants · Eligibility criteria revisedv668Show 2 more changesShow less
Minor7 versionsRe-verified since Aug 19, 2025, no change to tracked fieldsv646-v652
MinorStudy Status, Eligibilityv645
Minor11 versionsRe-verified since May 3, 2025, no change to tracked fieldsv634-v644
Stopped: an ongoing trial was terminated, suspended or withdrawn.
Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
Minor: routine progress and housekeeping, such as sites added or enrollment closed.
Background:
Transcranial magnetic stimulation (TMS) is form of non-invasive brain stimulation. It is approved to treat depression. TMS may help decrease drug craving. It is important to understand how TMS affects the brain. Such a better understanding would help to design ways to treat drug addiction.
Objectives:
To learn how TMS affects the brain when it stimulates an area in the front of the brain. Also, to see how the stimulation affects the area stimulated and other connected areas.
Eligibility:
Healthy, right-handed adults ages 18-60 who are non-drug users.
Design:
Participants will be screened under protocol 06-DA-N415.
Participants will have at least 3 visits. The first visit will last about 3 hours. All other visits will last up to 6 hours. Participants cannot use drugs or alcohol at least 24 hours before a visit. They cannot have more than half a cup of a caffeinated drink at least 12 hours before a visit.
Each visit will include a brief medical history update, urine test for drugs and pregnancy (if female), a breath test for alcohol and smoking, and questionnaires.
Participants will have a TMS orientation visit. A wire coil will be placed on the head. An electrical current will pass through the coil to create a magnetic pulse that stimulates the brain.
The other visits will include 2 sessions of TMS-MRI. Participants will lie on a table that slides into a cylinder. The TMS coil and the MRI coil will be placed over the head. Pictures will be taken of the brain with and without stimulation.
Participants will complete a questionnaire about how they feel before and after each TMS session and in a follow-up call 1-3 days after their last session.