Personalized Brain Stimulation to Help Veterans Quit Smoking

Inclusion Criteria:

* Veteran
* Individuals who smoke 10 or more cigarettes per day and have a CO level \> 10 ppm indicative of recent smoking
* Those who have not received substance abuse treatment within the previous 30 days
* Those who have been stable on psychotropic medications for at least three months
* For females, those who test non-pregnant and use adequate birth control
* Those who are willing to provide informed consent
* Those who can comply with protocol requirements and likely complete all study procedures
* Those who are motivated to quit smoking (based on responses of "very likely" or "somewhat likely" in the motivation questionnaire

Exclusion Criteria:

* Current moderate to severe substance use of any psychoactive substances other than nicotine or caffeine, as defined by DSM-V criteria
* Contraindications to MRI (e.g., metal in the skull, orbital or intracranial cavity, or claustrophobia)
* Contraindications to rTMS (history of a seizure or epilepsy)
* A history of autoimmune, endocrine, viral, or vascular disorders affecting the brain
* History or MRI evidence of neurological disorder that would lead to local or diffuse brain lesions or significant physical impairment
* Unstable cardiac disease, uncontrolled hypertension, severe renal or liver insufficiency, or sleep apnea
* Major Axis I disorders diagnosed according to DSM-V criteria, such as bipolar affective disorder, schizophrenia, dementia, or major depression

  * Regarding the Veteran population, the investigators will enroll smokers who have PTSD
* Current use of other forms of nicotine delivery, such as nicotine patches or electronic cigarettes
* Currently prescribed bupropion and/or varenicline