Please select the eligibility criteria that correspond to the clinical trial below.
Title: Varenicline for Cognitive Deficits and Cigarette Smoking in Schizophrenia - Efficacy and Predictors, Independent Investigator Study
Brief Summary: This is a 8-week double-blind placebo controlled parallel group study of the efficacy of varenicline (Chantix) for smoking cessation in schizophrenic patients, and its effect on cognitive function in patients with schizophrenia.At some sits evaluation of smoking measures is extended to 12 weeks. Correlations will be made with biological predictors of efficacy: a) measures of nicotinic receptors in lymphocytes b) DNMT1 and GAD67 mRNA in lymphocytes. Subjects will be current cigarette smokers or history of regular smokers.


Options:
A: Inclusion Criteria:

* Retail/community pharmacists practicing in Qatar will be eligible for participation in the study.

Exclusion Criteria:

* None
B: Inclusion Criteria:

Diagnosis of Schizophrenia or Schizoaffective Disorder Current Cigarette Smoker or History of Chronic Cigarette smoking Age 18-65 Currently taking antipsychotic medication

Exclusion Criteria:

prior history of hospitalization for acute myocardial infarction or stroke, or persistent angina pectoris with current symptoms Patients who have previously tried varenicline and have stopped taking it because of side-effects of severe nausea or vomiting suicide attempt in the last year and or have had prominent or serious suicidal thoughts in the past year Women who are pregnant, nursing, or unable to use reliable contraception significant renal impairment(Creatinine ≥ 1.5) baseline Hamilton Depression Scores is \>20
C: Inclusion Criteria:

* Male or female cigarette smokers, 18- 75 years, motivated to stop smoking and considered suitable for a smoking cessation attempt.
* Smoked an average of at least 10 cigarettes per day during past year and during the month prior to the screening visit, and exhaled carbon monoxide (CO) \>10 ppm at screening.
* For Neuropsychiatric cohort- subjects must have proper diagnosis as outlined in protocol.

Exclusion Criteria:

* Subjects with a past or current diagnosis of one of the following disorders:

  a. Psychotic Disorders:
* Schizophreniform
* Delusional Disorder
* Psychotic Disorder NOS b. All Delirium, Dementia, and Amnestic and Other Cognitive Disorders c. All Substance Induced Disorders (Other than nicotine)
D: Inclusion Criteria:

* ≥ 18 years of age
* Smoke at least 10 cigarettes/day for the past year
* Suffered an enzyme-positive ACS
* Planned hospitalization of ≥24 hours
* Motivated to quit smoking
* Likely to be available for follow-up
* Able to understand and read English or French

Exclusion Criteria:

* Medical condition with a prognosis of \< 1 year
* Pregnant or lactating
* Current use of Wellbutrin or any other medications that contain bupropion
* Current use of any medical therapy for smoking cessation (e.g. BuSpar, fluoxetine, doxepin, nicotine gum, or nicotine patch)
* Current seizure disorder, history of seizures or predisposition to seizures (e.g. history of brain tumor, severe head trauma, or stroke)
* History of bulimia or anorexia nervosa
* Current diagnosis of major depression (requiring medication), bipolar disease, or dementia
* History of suicidal events (previous suicide attempt, suicidal ideation) or family history of suicide
* Diagnosed hepatic failure, cirrhosis, hepatitis or history of hepatic impairment (AST or ALT levels ≥ 2 times upper limit of normal prior to admission for ACS)
* Renal impairment with creatinine levels ≥ 2 times the upper limit of normal
* Excessive alcohol consumption defined as ≥ 14 alcoholic drinks per week
* Use of any illegal drugs in the past year (e.g. cocaine, heroin, opiates)
* Current use of medications that lower seizure threshold e.g. amantadine, anti-depressants, anti-malarials, anti-psychotics, levodopa, lithium, quinolone antibiotics, ritonavir, systemic steroids, theophyllin, type 1C antiarrhythmics (e.g. encainide, flecainide, propafenone)
* Use of MAO inhibitors or thioridazine in the past 15 days
* Current use of over-the-counter stimulants (e.g. ephedrine, phenylephrine) or anoretics

Answer: B