Allopurinol is the most effective drug for gout treatment and prevention. It works by inhibiting xanthine oxidase, the enzyme that converts hypoxanthine to xanthine and xanthine to uric acid, thereby reducing uric acid production. Disulfiram is for alcohol aversion, rifampicin is an antibiotic (tuberculosis), and halothane is an inhalational anesthetic - none are gout medications.