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 CY D2/850 E58 NT 200 PAD 0106 RD 71 221 738 SUSTIVA 2876 180 RD 70 C6 K75 NORCO 729 M C1 A3 or P F52 297 gleevec 48 11 U3 BERTEK 670 T0101 P-D 916 E 71 CL9 WATSON 606 TZ 4 E 11 A94 CL 85 W 924 WPI 100 1 MP 512 ucb 500 logo and Pamelor 50 mg S 121 524