https://medixway.com/guanfacine-vs-clonidine/
Both extended-release clonidine (Kapvay) and extended-release guanfacine (Intuniv) have been found to be effective for reducing ADHD symptoms in children and teens, both as adjunct treatments and on their own. These medicines interact with the brain in similar ways, and one isn’t necessarily better than the other for ADHD. However, there are some differences to be aware of when looking at Kapvay vs Intuniv.