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 L 8 M MT EP 139 ZA-18 logo and 9 A 20 MYLAN 5280 93 29 U42 PLIVA-648 RP 701 PLIVA 469 MYLAN AC I 02 H 01 377 S Z A2 25 66 Y A IK 378 CellCept 250 P0 02 5/500 W 905 MYLAN 6899 b 97 N 2 N 50 N 940 RI20 44 447 ATN Y02 S 180 US P-113 5684 287 TCL333 GG 201