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 ST 300 CYP 189 LCL LCI 1318 54 716 FOR SLEEP M EL 15 G443 logo and 012 L19 logo 137 u100 SZ442 A 6 M164 CTI 222 PBT 5.0 HLP 10 54 793 PRECOSE 50 906 0425 V362 A ms W 903 logo and 33 54 356 PAD 0107 FX 75 229 or 230 397 44 588 EVT CYP 870 93 5514 GG 771 L344 HP532 376 12 21