Pill Identification by Imprints: MT3 Home Pill Identification by Imprints: MT3 1 result TRAMADOL HCL ER 300 MG TABLET Side 1: MT3 Color: White Side 2: Shape: Oblong Other Popular Drug Imprint 645 YB M RE MYLAN 531 CL 31 CIFEREX MUTUAL 866 ALG 263 L409 P-2 I4 600 AF 25 222 CREON 1212 13 30 BL 302 ANAFRANIL 75 mg PAR 822 M2A4 57344 1 EZEM Nitro-Dur 0.8 mg/hr MYLAN 345 L413 CTI 121 OP100 NP 5 MYLAN 6726 MP 89 ATABEX b 973 C370 REL900 10 00 M522 44 69 K 16 C7 68 -7