MUMBAI, Aug 30 (Reuters) - Sun Pharmaceutical Industries Ltd (SUN.BO: Quote, Profile, Research), India's most valuable drugmaker, said on Thursday it had received tentative approval from the U.S. Food and Drug Administration for galantamine tablets in multiple strengths. Galantamine, a generic version of Razadyne, distributed by Ortho-McNeil Neurologics Inc, is indicated in the treatment of mild to moderate dementia.