I want to take a mild stimulant for ADD. The energizing effects of the ADD pill last for 3 hours. I understand the stimulant causes some constriction of blood vessels. Is there a way I can take the Timolol drops for Glaucoma at a time of the day that will allow me the benefits of Timolol drops as well as the ADD stimulants? What if I take the Timolol drops at 10:30 p.m. and a dose of the stimulant about 9 a.m. and again about noon?