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 KU 106 S591 P 15 A59 54 551 EL501 M D11 M 106 RTG-200 TL012 RPR 202 PLIVA 518 logo and 290 A-295 L-2 ME RE12 logo and 143 PLIVA 467 CTI 141 HLP 20 CARDURA 0398 19 G FENTANYL 800 MYLAN 197 G-DS-75 WP MP 89 EFF M250 A3 or F1 297 M RN2 K1 SZ245 333 IG L050 OMP 20 R207