Exhibit 16.1

0 +1 317 805 6200 F +1 317 805 6201

RSM RSM LLP November 5, 2021 Oneamerica Tower 1 American Square Suite 2800 Indianapolis, IN 46282 Securities and Exchange Commission0 +1 317 805 6200 Washington, D.C.20549F +1 317 805 6201 www.rsmus.com commissioners: We have eradInotive, Inc.’s (f/k/a Bioanalytical System, Inc.) statements included under Item 4.01(a) of its Fom 8-K filed on November 5, 2021, and we agree with such statements concerning our firm. RSM VS LLP THE POWER OF BEING UNDERSTOOD AUDIT I TAX I CONSULTING RSM US LLP is the U.S. member firm of RSM International, a global network of independent audit, tax, and consulting firms. Visit rsmus.com/ aboutus for more information regarding RSM US LLP and RSM International.