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 E550 926 MYLAN 5427 M Z2 6469 R12 P 984 240 LILLY 4420 W 903 WAT SON 58 82 SZ 788 E 152 123 S2 MYLAN 199 n 353 A08 E 655 M GP2 E 5000 CL7 D 86 AW XL184 80 mg or XL184 20 mg TR50 ANI 231 48 10 ALLFEN 553 SCI AN293 FOR SLEEP M G12 IP 203 V250 EP 117 MYLAN 531 TOPAMAX