Beginning dose after being off of it 7 weeks

Patient: 8 yr old boy was on Intuniv, 3 mg dose, for ADHD for one year and then med became unavailable to him. Now that the med is available to him again can he start back on the 3 mg dose after being off of it 7 weeks or does he have to go back to 1 mg then 2 mg and then 3 mg???

Symptoms: Symptoms does not apply to my question

Doctor: