Guanfacine extended-release (Intuniv®) and clonidine extended-release (Kapvay®) are both FDA-approved for the treatment of ADHD as monotherapy or as adjunctive therapy to stimulant medications. Guanfacine extended-release (Intuniv®) and clonidine extended-release (Kapvay®) are similar in their mechanism of action and their efficacy with regards to ADHD. Textbooks and review articles that I looked at did not…