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 COUMADIN 10 Pepto Bismol WP 0320 ZGNX 40 mg ML 1 FL12 ACN 4 WW 125 M D54 296 S 572 Cdx 50 MAXALT logo and 342 C82 TL 001 A973 M A12 CLOM 75 AK 160 229 229 H5 ZA-17 logo and 3064 1081 ZC17 M PD3 RI 61 46 T004 NP 12 ZD 16 DYAZIDE SB C72 UPSHER-SMITH 0225 H126 44 291 266 L 34 2292