Ariella Sharf was first prescribed antidepressants when she was a college student more than a decade ago. When she decided to stop taking them last year, Sharf says she wasn’t sure how to do it safely. The startup is betting that many of the growing number of Americans taking antidepressants will eventually want help coming off them. About one in six people who stop taking antidepressants experience side effects like nausea and dizziness, especially if they do so abruptly, according to one study. Known as “hyperbolic tapering,” it’s a substantially more drawn-out process than other methods used to help people get off meds.