Pill Identification by Imprints: E 221 Home Pill Identification by Imprints: E 221 1 result METFORMIN HCL 1,000 MG TABLET Side 1: E 221 Color: White Side 2: Shape: Oval Other Popular Drug Imprint XL184 20 mg ML 30 Z16 OP 703 212 212 832 BM1 logo and H9 U7 or U13 AN 511 S553 logo and 4366 logo and 35 E 401 CL60 L 166 cor 226 N 100 MAXIPHEN CLR 50 GG 97 E 882 alg ZC 79 U L logo and 530 ZE 43 MP 512 WW 268 LU CL 82 AN 521 M 724 MOTRIN PM NP 10 ALEVE COLD&SINUS ZGNX 20 mg 7033 A112 93 311 G 343