Pill Identification by Imprints: U 400 Home Pill Identification by Imprints: U 400 1 result THEOPHYLLINE ER 400 MG TABLET Side 1: U 400 Color: White Side 2: P F Shape: Round Other Popular Drug Imprint SPD417 ML 4 D 84 B167 FS 556 U42 MYLAN 531 ANI 173 689 FLI 21 mg P212 CL 205 G 021 IP 254 H108 AN897 5 X L012 logo and 2849 C020 CL WFHC 1052 rfx logo and A1 ED DM VPHEME GG 771 logo and 404 B 50 750 MG RP GG 451 logo and 667 WATSON 782 ZE 50 CB 2 1 IP 109