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 GGN5 BMS 250 mg 4 0 B 302 M 545 par 027 LH1 WW 176 West-ward 769 C 474 KEFLEX 250 mg K 78 Butrans 10mcg/hour RG87 U36 T591 WELLBUTRIN SR 200 ELP 5 MYLAN 345 TZ 4 44-389 037 MP 37 F51 SPI U 128 PD 237 FX100 EXELON 6 mg fentanyl 1200 mcg RX724 5553 U39 C-122 AN897 5 Sandoz 663 601 652 A973 PAXIL