What can I do if I've been falsely accused of sexual harassment?
Be careful and weigh the ramifications. A defamation claim arising from sexual harassment accusations is bound to be very emotional. Ultimately, such a "he said, she said" scenario probably boils down to the credibility of the accuser and the accused. Who will the jury believe?
If your reputation has been significantly harmed, the facts are straightforward and supportable, and the defendant able to pay damages, a claim may be worth pursuing. If you are trying to avoid publicity, be aware a lawsuit probably only adds to it.
Consult a libel and slander attorney who can evaluate your claim in confidence.