Pill Identification by Imprints: M450 Home Pill Identification by Imprints: M450 1 result PHENAZOPYRIDINE 100 MG TAB Side 1: M450 Color: Reddish-Brown Side 2: Shape: Round Other Popular Drug Imprint RAS MEPHYTON RH 046 1385 A P MX 24 R2 Advil C&S IBgard OMN 1453 NXT NAPROSYN BP 321 1 4 PFIZER 397 V249 ZANTAC 300 APO 200 803 HORIZON 205 BMS 80 E 53 IP 178 U 168 CORTEF 5 barr 324 O E L235 ZC 15 TL 383 1222 logo and 4806 E 114 MYLAN 1650 51A 2231 M522 321 GX CE5