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 CDT 252 IL 3583 H10/325 barr H 104 GG 823 GGD7 FDX MP 12 IPX066 M 177 logo and 2781 2292 VIP 107 ML 36 1272 212 WPI 3659 SB 4142 334 1180 par 117 PC1 OS SL L U Z622 TL600 L181 C 16 LA16 CL 85 231 logo and 076 WAR 5 E43 PA 916 305 CPC2069 Lilly 3238