Study population: Recruitment from the Baltimore, Maryland area will take place for this protocol. For the Pilot, 20 cocaine dependent (CD) individuals will be recruited. For the Clinical Trial, 50 healthy adults (HC) and 100 CD individuals will be recruited. All of the HC group will receive both active- and sham-iTBS in a within-subject crossover design. Half of the CD group will receive active-iTBS and half will receive sham-iTBS. The Clinical Trial groups will be matched on demographic measures (e.g., age, IQ, sex).