Alcohol Drinking/drug therapy; Alcohol Drinking/psychology; Conditioning, Operant/drug effects; Nicotinic Agonists/therapeutic use; Acetylcholine/pharmacology; Animals; Azabicyclo Compounds/chemistry; Azabicyclo Compounds/pharmacology; Behavior, Animal/drug effects; Benzazepines/chemistry; Benzazepines/pharmacology; Brain/drug effects; Brain/metabolism; Cell Line, Transformed; Choice Behavior/drug effects; Disease Models, Animal; Dose-Response Relationship, Drug; Drug Administration Schedule; Drug Interactions; Ethanol/administration & dosage; Humans; Male; Nicotinic Agonists/chemistry; Nicotinic Agonists/pharmacology; Protein Binding/drug effects; Rats; Rats, Sprague-Dawley; Receptors, Nicotinic/genetics; Receptors, Nicotinic/metabolism; Self Administration/methods; Taste/drug effects; Time Factors; Transfection/methods