Pill Identification by Imprints: K4 Home Pill Identification by Imprints: K4 1 result PROMETHAZINE 50 MG TABLET Side 1: K4 Color: Pink Side 2: Shape: Round Other Popular Drug Imprint GPI A5 456 RI2 AVA ZC 07 99 PA 500 MYLAN 1200 54 943 MP 81 568 100 mg T539 WATSON 343 FLI 21 mg FLZ 200 60 98 V359 E 13 PC 22 SYMAX A 20 SPI E62 160 R50 44 226 FENTANYL 100mcg/hr RX125 T598 W 1037 TMC125 H7.5 325 Estradiol 0.025 mg/day T32 MYLAN FE 200 MAXIPHEN DM 720 IX GG 929 M 543