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 MYLAN TM 5 M U13 2 VALIUM E 174 UPSHER-SMITH 0229 467 54 731 U 785 3613 IL Takeda ML 43 MYLAN ZE 40 M A30 logo and 13 AR 787 logo and 81 93 7371 D5 M C2 125SLXP PD 157 MYLAN 5050 L236 APO 018 N T4 12 logo and 202 1222 RX 901 54 306 GG 97 N 135 ella C280 NORTRIPTYLINE PX 2 RE 21 245 ATN 100 HP 63