Pill Identification by Imprints: P F Home Pill Identification by Imprints: P F 2 results THEOPHYLLINE ER 400 MG TABLET Side 1: U 400 Color: White Side 2: P F Shape: Round THEOPHYLLINE ER 600 MG TABLET Side 1: P F Color: White Side 2: U 600 Shape: Rectangular Other Popular Drug Imprint logo and 4356 109 SUDAFED 12 HOUR M 745 538 ASPIRIN L GSK Coreg CR GG 225 VIO9111 54 017 1423 Phillips' CP 404 XANAX 0.5 GG 706 I5 XL Lilly 3229 ZA21 barr 100 mg 173 PREMPRO 0.45/1.5 212 212 logo 222 500/20 ZC 65 93 711 877 HP59 NT6 AK L052 A94 b 94 ML 37 A09 W 30 V270 T26 1034