Transition Therapeutics Inc. is a product-focused biopharmaceutical company. The Company's principal business activity is the researching and developing of therapeutic agents. The Company is developing therapeutics for central nervous system (CNS) and metabolic disease indications. The Company's technologies are focused on the treatment of agitation and aggression in Alzheimer's disease and diabetes. The Company's subsidiary, Transition Therapeutics Ireland Limited (Transition Ireland), is developing two drug candidates: neuropsychiatric candidate ELND005 and androgen deficiency candidate TT701. The Company's subsidiary, Waratah Pharmaceuticals Inc. (Waratah), is developing diabetes drug candidate TT401. The Company's other two entities provide development services in support of the clinical and non-clinical activities of Transition Ireland and Waratah.