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 K 16 54 942 AN 511 BI 6 L069 PD 223 31 81 14/10 ACN 8 H22 L178 24 E 32 IMITREX BM 105 656 MYCOBUTIN US 10 logo PAMELOR 75 mg K7 E 2 logo and 1002 7188 C223 M 28 A 39 GS TF7 MP 17 Northera CIT CL62 ZBN OP 707 WW 176 L023 BI 11 5150 WELLBUTRIN SR 150 IBU200 832 100