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 P 240 ZANTAC 150 JKI 11 54 521 5513 CM 156 1205 Z350 50 mg CTI 117 M D6 Q150 01 U42 METHADOSE 40 331 RF 27 L 349 ML 040 CALAN E 123 MYLAN 772 LILLY 4115 BNP 7600 EP 136 L127 H 012 CL 41 UCB 500XR T535 D2/850 90 M 120 93 5268 717 N 940 256 IP33 359 RP 106