Pill Identification by Imprints: D21 Home Pill Identification by Imprints: D21 1 result DOXYCYCLINE MONO 50 MG TABLET Side 1: M Color: Light Yellow Side 2: D21 Shape: Round Other Popular Drug Imprint 671 MYLAN A1 WPI 338 M L23 E 32 L15 AA 13 R25 93 833 E4 CR 500 FO M F6 010 ZA-35 370 E 1 7.5 P 075 RDY 343 L121 37 45 166 CL 32 B528 CB Ziks631 AC 357 44-503 logo and 200 BP 802 LITHOBID 300 54 447 140mg CPC835 TEVA 01A C 91 LL713 2L or 10LA 150 XL