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 HU Z198 M 37 DG1 P 0 1 par 028 HP 531 2683 32 L142 CNG1 NL 771 SG 109 NEORAL 100mg Vivelle-Dot 0.05 mg/day 93 3167 MYLAN 5428 93 308 AK 7.5/1000 MIA 110 E3 AN 553 5266 S 127 AP4 M 27 ER 5 MYLAN 7150 OTSUKA 45 mg or 15 mg HALCION 0.25 XL184 20 mg A 0.5 PLIVA 334 TEVA TEVA M U13 T0101 N L S 430 AA250