Pill Identification by Imprints: M451 Home Pill Identification by Imprints: M451 1 result PHENAZOPYRIDINE 200 MG TAB Side 1: M451 Color: Reddish-Brown Side 2: Shape: Round Other Popular Drug Imprint EM2 PH 043 E 124 RX 774 V 2 N20 166 logo and 127 PC 22 fentanyl 1200 mcg ML 53 TV I54 GG N7 B 543 E226 Tandem Plus NAPROSYN 250 ZA19 MUTUAL 866 HYD 30 GG 822 GG 505 EK 25 MYLAN 214 SZ 309 N 940 Z 12 VP APO 034 OTSUKA 60 mg or 30 mg 93 948 PH 020 CL 38 200 NPR LE 375 D A-25mg 268/40 P294 APO T150