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 M F4 logo and TF 93 293 1325 MYLAN 3404 925 3 44-389 MYLAN 6380 G 4910 fentanyl 600 mcg MYLAN ZE 20 735 logo and 342 C 92 L131 ULTRAM 689 C 15 BR 348 ZYRTEC FLZ 50 VASERETIC S12 403 E 63 N 305 I 10 MYLAN TM 5 O20 8 07 GG 550 logo and 2848 MP 658 INCY G75 logo and 497 I 36 FLO FL 72 ML-P16