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 RH37 O15 RI19 D C IP 117 E 42 IP 174 0476 DANTRIUM 50mg OP150 C47 712 2683 Q21 C8 or C7 or C6 or C9 L 80 IP 466 ZC43 15/500 Metanx PA09 F 2 E 12 AMB 10 L015 GG 606 LIMBREL 52006 M 41 S 370 logo 54 162 ALV 196 ZC 80 M. Amphet Salts 93 5295 803 L200 35 79 MP 659 MOD 100