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 3170 V ICAPS P L K 101 271/100 44 542 OMN Lilly 3229 E 415 K 7 KALI S190 A 39 VP 076 RX 526 D05 G 3719 T1 or T2 or T3 or P W 905 CR 250 AC359 FL11 240 mg CL 20 logo and 3091 A15 046 E 42 PLIVA 482 par 029 P201 MP 26 C45 WATSON 801 GPI A325 EP136 M159 B 566 amneal 356