Pill Identification by Imprints: N 23 Home Pill Identification by Imprints: N 23 1 result NISOLDIPINE ER 30 MG TABLET Side 1: M Color: Orange Side 2: N 23 Shape: Round Other Popular Drug Imprint R 2.5 IP207 341 logo and 121 STO 75 FL11 logo and 22 S 429 54 311 V254 L 166 S190 REL BERTEK 670 PREMARIN 0.625 L15 WPI 867 134 M 515 EV 0207 11 720 M 41 FH 160 L069 M L53 WC U23 EL600 M T11 NP 14 453 ATON 705 PROVERA 5 BP 607 678 RP103 44 157 V-Z-F DG1