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 344 SZ 210 S 571 360 RX121 E 102 DISTA H69 L254 logo and 3091 147 F 27 M 155 MP 573 90 L016 SZ 183 EXH 12 93 7334 M A30 A-264 E61 ANI 231 MYLAN 3050 logo and 341 AAA 1031 93 1003 TL516 I31 ZLP M 45 E 39 EP 321 logo and 637 novo 278 93 62 R179 FENTANYL 1600 GGD6 44 291 BP 631