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 AR 102 503 C 92 OV Z 4236 E 27 I 27 RP RCC E 263 MP 273 D1 42 10 logo and 5 MP 88 AN 572 44-292 M 530 S 225 V40 978 RD02 SL 456 PLAQUENIL RX 901 C 14 20700UL 230 L441 145 5686 MCR 109 ZOLOFT K 46 MYLAN FE 134 LANOXIN U3A VASO 20 N 30 AMOXIL 500 T 193 USL 8