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 A116 M L23 783 ZLP 782 114 LV 78 RE 24 GG C9 cpc43 MYLAN 2500 RE 22 GG 108 1MG M164 I 25 AN 351 268/40 GX ES7 161 n RG87 B 294 94 DAN 5554 P 2.5 M 138 100 101 M 93 logo and S12 D par 209 PLETAL 50 283 IMO CTI 103 XTAMPZA ER K5 9 2 V355