Nicotinic Receptor Genetic Variation and Alcohol Reward

Exclusion Criteria

• •1. Non-English speaking individuals. Justification: The study materials, MRI tasks and
• •assessments (including the outcome measures) are validated only in English language.
• •2. Current or prior history of major medical illness, including CNS, cardiovascular, respiratory, gastrointestinal, hepatic, renal, endocrine, or reproductive disorders. Justification: Many illnesses may alter the neuropsychological effects of alcohol as well as MRI measures. \[assessment: clinically significant findings on medical history and physical exam, ECG, laboratory tests\]
• •3. Positive hepatitis \[A, B antigen, or C\], or HIV test at screening. Justification: Hepatitis can alter liver function and alcohol pharmacokinetics. HIV infection can alter brain function. \[assessment: laboratory tests\]
• •4. Current \[past 12 months\] history of psychiatric disorders, including depressive disorder, bipolar disorder, or anxiety disorders. Justification: Concurrent psychopathology can alter brain function and alcohol response. \[assessment: SCID interview\]
• •5. Lifetime history of psychotic disorders, obsessive compulsive disorder \[OCD\], post-traumatic stress disorder \[PTSD\], or eating disorder. Justification: These disorders can have long-term effects on brain function and alcohol response. \[assessment: SCID interview\]
• •6. Current or lifetime diagnosis of alcohol or substance use disorder. Past mild AUD or past mild SUD with no current symptoms for atleast 2 years will not be exclusionary. Justification: History of moderate to severe alcohol or substance use disorder will impact brain function and alcohol response. We do not anticipate past mild AUD or SUD in remission for 2+ years would have such impact on brain function and alcohol response. We will examine this in our exploratory analysis. We will also do a follow-up telephone/teleheath visit with these participants to assess any changes in alcohol or substance use or problems related to their participation in the study \[assessment: SCID interview\]
• •7. Currently seeking treatment for alcohol use disorders. Justification: It would be unethical to administer alcohol to individuals seeking treatment for alcohol problems. Also, this study does not provide treatment for individuals with alcohol use disorder. \[assessment: medical history\]
• •9. Non-drinkers \[alcohol-naive individuals or current abstainers\] or individuals with no experience drinking 5 or more drinks on one occasion in their lifetime. Justification: It would be unethical to administer alcohol to individuals that do not drink alcohol. \[assessment: Timeline Follow Back, Lifetime Drinking History, Additional History Form and medical history\]
• •10. Positive result on urine drug screen or positive breathalyzer during screening visit. Positive urine drug screen or breathalyzer reading during more than 1 study visit will result in participant withdrawal from the study. Justification: Current or recent exposure to alcohol or drugs of abuse could impact brain function and alcohol response. \[assessment: laboratory tests and breathalyzer test.
• •11. Current or prior history of alcohol-induced flushing reactions, including rapid reddening of the face, rapid heart rate and breathing, and nausea after 1 or 2 drinks. Justification: It would not be safe to administer alcohol to individuals with the highly aversive flushing response to alcohol. \[assessment: alcohol flushing questionnaire\]
• •* Use of prescription or OTC medications known to interact with alcohol 2 weeks prior to screening or screening update visit. These include, but may not be limited to: isosorbide; nitroglycerine; benzodiazepines; warfarin; anti-depressants such as amitriptyline, clomipramine and nefazodone; anti-diabetes medications such as glyburide, metformin and tolbutamide; H2-antagonists for heartburn such as famotidine, cimetidine and ranitidine; muscle relaxants; anti-epileptics including phenytoin and phenobarbital; codeine and opioid analgesics including Darvocet, Percocet and hydrocodone;
• •* Regular (more than once a week) or prescribed use of the following medications and unable to refrain from these medications for 48 hours prior to study visits: anti-histamines, pain medicines, and anti-inflammatories such as aspirin, ibuprofen, acetaminophen, celecoxib, and naproxen.
• •* Use of medications known to inhibit or induce enzymes that metabolize alcohol for 4 weeks prior to screening. These include chlorzoxazone, isoniazid, metronidazole, and disulfiram.
• •* Use of drugs known to affect hemodynamic response 2 weeks prior to screening or screening update visit. These include antihypertensives, insulin, and thyroid medications.
• •Note that any discontinuation of medications will only be done at the recommendation of a physician. \[assessment: medical history and physical exam\]
• •* Left-handedness \[Edinburgh Handedness Scale\]. Justification: To avoid lateralized effects on brain function measures and reduce potential variance in MRI signals.
• •* Presence of ferromagnetic objects in the body that are contraindicated for MRI of the head \[including but not limited to pacemakers or other implanted electrical devices, brain stimulators, some types of dental implants, aneurysm clips, metallic prostheses, permanent eyeliner, implanted delivery pump, or shrapnel fragments\].
• •* Fear of enclosed spaces. Justification: To minimize risk and discomfort.
• •* Inability to lie comfortable on back for up to 2 hours in the MRI scanner. Justification: To minimize risk and discomfort. \[assessment: NIAAA MRI Safety Screening Questionnaire\]
• •* Pregnant \[assessment: urine beta-hCG test at screening\]. Women must also test negative on urine beta-hCG test at the start of every study visit.
• •* Breast-feeding \[assessment: medical history and physical exam\].
• •Screen Failures:
• •Screen failures are defined as participants who consent to participate in the clinical trial but are not subsequently assigned to the study intervention or entered in the study. A minimal set of screen failure information is required to ensure transparent reporting of screen failure participants, to meet the Consolidated Standards of Reporting Trials (CONSORT) publishing requirements and to respond to queries from regulatory authorities. Minimal information includes demography, screen failure details, eligibility criteria, and any serious adverse event (SAE).
• •Individuals who do not meet the criteria for participation in this trial (screen failure) because of a positive drug test, positive pregnancy test or positive breathalyzer reading may be rescreened. Rescreened participants should be assigned the same participant number as for the initial screening.