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 LE 500 G 1540 G433 MP 20 Nitro-Dur 0.2 mg/hr PERCOCET M32 NC 200 R 7.5 DARAPRIM A3A N120 568 100 mg B104 M 261 MO1 383 C 15 BCI G46 N 344 M 1 EP 321 K237 LK 25 192 HP 43 220 TAK ALG-12.5 U 129 logo 2666 logo and 346 10 31 logo 111 329 ZYBAN 150 P 60 PGZ 7 99 CL 25 logo and 077