Pill Identification by Imprints: AN 321 Home Pill Identification by Imprints: AN 321 4 results NIACIN ER 500 MG TABLET Side 1: AN 321 Color: Orange Side 2: Shape: Round NIACIN ER 500 MG TABLET Side 1: AN 321 Color: Orange Side 2: Shape: Round NIACIN ER 500 MG TABLET Side 1: AN 321 Color: Orange Side 2: Shape: Round NIACIN ER 500 MG TABLET Side 1: AN 321 Color: Orange Side 2: Shape: Round Other Popular Drug Imprint 54 215 SU PE 501 R471 MJ 755 735 CAPACET VASERETIC Butrans 20mcg/hour MYLAN 6725 RSN 8 08 logo and 57 PA 916 672 XL184 20 mg M C53 E 615 CL 78 K 44 832 BM05 93/12 N 30 710 A175 0384 40 mg E 140 E 134 FOSTEUM 52003 N 741 KEFLEX 250 mg M 171 EL E 799 Caltrate ZC 66 logo and 161 logo and 76 CL 23 R DY