Pill Identification by Imprints: 4221 Home Pill Identification by Imprints: 4221 1 result KOMBIGLYZE XR 5-500 MG TABLET Side 1: 5/500 Color: Light Brown Side 2: 4221 Shape: Oblong Other Popular Drug Imprint 721 T2 MYLAN 5100 PO S1 CL 41 N 739 par 210 N 08 ML 1 logo and 5241 ASK001 A 13 S 121 M 200 I 1 7 ANCOBON and logo 500 ICN AN898 10 44 175 1 RP C171 IP 253 CL 32 42 10 31 80 MYLAN 1400 ISA OMEPRAZOLE 40 mg N P L133 G 1 10 31 230 FL 7/10 575 209 or 274 COR 124 E701 KLX ZD 20 7.5/500