There are several reasons for choosing a non-stimulant medication. Stimulants do not relieve symptoms.
Stimulants cause intolerable side effects.
Medical problems make stimulant use difficult. In this case, we may need to treat both conditions. In some cases, we will stop the stimulant and substitute another medication. In other cases, we add a second agent to the stimulant regimen. They can provide 24-hour coverage, and may not create the sleep difficulties sometimes associated with the stimulants.