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 M 171 E 4 DYRENIUM 50 mg E 129 93 129 1158 AN 415 KU 129 E61 ZE 65 832 BM05 VASCEPA DAN 5554 logo and 667 1250 44-466 K 27 140 mg ZC56 PRAVACHOL 20 logo 272 Z4 F 85 377 barr 24 mg US 15 RH38 BNP 7600 ASPIRIN UPSHER-SMITH 0229 MP 8 15 XL 10 or 20 E 74 708 TEVA 7590 ZGNX 40 mg MYLAN 7010 L977 CRESTOR