Thank you for your question and welcome to ADHDCentral.com.
I am not a medical professional and would not be able to give you medical advice.
According to the information on the U.S. Food and Drug Administration (FDA) website:
"Tablets: Administer in divided doses 2 or 3 times daily, preferably 30 to 45 minutes before meals. Average dosage is 20 to 30 mg daily. Some patients may require 40 to 60 mg daily. In others, 10 to 15 mg daily will be adequate. Patients who are unable to sleep if medication is taken late in the day should take the last dose before 6 p.m."
I hope this helps
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