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 ZD18 215 M RE CLARITIN-D 24 HOUR SUPRAX 100 E700 HP 3 C 15 247 or 304 SLV 878 30 ML 88 M 7 TARO MX33 SCHWARZ MYLAN 4070 ZE 37 MIDOL PM G 020 524 PRODRIN S429 500 mg L121 APO 102 N 3 LL PB logo 272 APR 0374 785 TCL333 CB7 W 30 DROXIA 6336 93 7373 229 SCI7