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 RG Alavert E 10 KEY 74 L 60 MP 658 227 A30 325/40 TOPAMAX E 655 logo and 4358 1 5 0 V41 MYLAN 1560 S251 AK 80 AV1 SZ 659 GG 505 332 T29 PX KU128 BVF 54 956 A01 MYSOLINE 50 OS 212 C 25 4943 024 93 7385 logo and 667 AP211 4187 NT or EP or E BRISTOL 3030 logo YF logo and 502