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 SLV ALV 317 293 logo and ZA logo and 342 L191 I 06 N 135 DAN 25 M 1745 AA par 209 ZC55 APO 019 FC 119 783 CL 42 CL 39 300 E 128 35 84 K 18 M RN R-264 LEVOXYL 233 and logo TL 177 93 5513 LILLY 4112 W962 9 2 93 293 SEARLE 1461 Advil C&S A-008 10 HYCAMTIN 749 MP 273 44 532 GMZ A 44