This study is testing a new treatment called CTN for adults with both ADHD (Attention Deficit Hyperactivity Disorder) and anxiety. ADHD affects focus and behavior, while anxiety can make people feel very worried or nervous. The study will see if CTN helps improve these conditions. Adults between 18 and 65 years old can join if they meet specific health criteria. **Key Points:** - **Study Duration & Visits**: Participants will need to attend several visits over a short period. The exact number of visits will depend on the study's requirements. - **Treatment & Tests**: Participants will take CTN and undergo medical tests, like blood tests, to ensure safety and track progress. - **Eligibility**: Participants should not have other major health issues like epilepsy or a recent history of substance abuse. Before joining, a doctor will evaluate if you meet the criteria. The study excludes people with certain medical histories, like prior CTN use or those who haven't benefited from other ADHD or anxiety treatments. Participants must agree to not use certain medications and to maintain consistent behaviors during the study.