Cerebral will stop writing prescriptions for Adderall, Ritalin, and other controlled substances to new ADHD patients as concerns grow about telehealth companies’ prescribing practices. To make matters worse, a former executive at Cerebral, a well-funded online mental health startup, claims in a labor lawsuit that the company fired him after he complained that the company was too quick to prescribe powerful stimulant drugs. Do online mental health apps work?