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 AP 84 Lofibra 134 mg 332 logo and 38 allegra-D PX 4 logo and 833 A333 RDY608 W W COUMADIN 2 MSB 001 MYLAN 6320 L 165 140 GP 151 ZA-36 2985 M C53 GG 929 J 050 S252 804 V 5 54 312 A222 MYLAN 531 HYD 60 VIP101 L424 MM DYN-115 N 11 1000 STO 50 G 223 NT 150 V210 PAL 6 MP 303