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 Fentanyl 100 mcg/hr N4 EP 137 CN 90 1080 E652 AN 627 VP 076 C82 N030 96 S 40 M 444 ED PSE Fentanyl 12.5 mcg/hr MX9 LASIX and logo 80 A 594 T 2 Onset M075 logo and 1112 AZ 010 U 128 31 90 A1 or A2 or A3 or A4 K 57 CL7 BETAPACE 744 1 1385 2858 93 42 PD 222 N 135 BCL 25 W961 W 29 3 5 0115 2790 MP 168