(25) "New drug" means:
(A) any drug, except a new animal drug, the composition of which is such that such drug is not generally recognized among experts qualified by scientific training and experience to evaluate the safety and effectiveness of drugs, as safe and effective for use under the conditions prescribed, recommended, or suggested in the labeling thereof (except that such an unrecognized drug is not a "new drug" if at any time before May 26, 1985, it was subject to the Food and Drug Act of June 30, 1906, and if at that time its labeling contained the same representations concerning the conditions of its use); or
(B) any drug, except a new animal drug, the composition of which is such that such drug, as a result of investigations to determine its safety and effectiveness for use under such conditions, has become so recognized, but which has not, otherwise than in such investigations, been used to a material extent or for a material time under such conditions.