Pill Identification by Imprints: Q21 Home Pill Identification by Imprints: Q21 3 results METFORMIN HCL ER 500 MG OSM-TB Side 1: Q21 Color: White Side 2: LU Shape: Oval METFORMIN HCL ER 500 MG OSM-TB Side 1: Q21 Color: White Side 2: LU Shape: Oval METFORMIN HCL ER 500 MG OSM-TB Side 1: Q21 Color: White Side 2: LU Shape: Oval Other Popular Drug Imprint U3 A7 or A2 P 242 54 717 567 N 60 logo and 833 ROBAXIN 500 U29 54 233 C8 WW 458 4214 576 1020 RX615 214 or 215 GG854 GG854 EXELON 6 mg MYCOBUTIN T 194 ZVR 100 L012 2230 VP 022 455 1070 5/500 Mucinex KEFLEX 750 N 81 M 753 L187 Vivotif Berna NT A-002 K 26 PBT 5.0 E 157 FLUOXETINE 40mg M 36