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 R531 B 304 C 93 ZC38 404 P/T ML 63 RX 537 691 logo and 75 E61 54 425 VP068 APO900 M B2 80 MB-111 A30 TCL 097 MYLAN 143 BACTRIM DS par 029 736 logo and NS 44 326 L41 MUTUAL 868 G&W 0555 2080 F 8 Rivastigmine 13.3 mg/24 hours N T MEDROL 4 H 604 RP160 AN896 2 ALV 332 E 170 NP 20 A-P 1