Pill Identification by Imprints: E51 Home Pill Identification by Imprints: E51 1 result MEPERIDINE 100 MG TABLET Side 1: E51 Color: White Side 2: Shape: Round Other Popular Drug Imprint PBT 5.0 RU20 ucb 500 VS 80 L977 SR 375 IP 203 M 52 VP 031 IL 3583 Tiazac 360 M 106 MYLAN 777 RE 20 SZ 344 W E4416 705 0027 V SANDOZ 625 AMBI 442 Metanx 54 922 PLIVA 456 PRAVACHOL 20 AN 513 L116 3RP H 146 44-367 54 549 GG 337 GS TEW 50 mg 644 STO 100 E 139 N 740 AC 355 35 35 B L