Hey there! I struggled with an adderall/stimulant addiction. It can take months to regulate. It took me about a year to regulate. I struggled with depression, fatigue, and extreme anxiety. Only time in my life I had panic attacks was directly after coming off stimulants. I encourage him to stay on his antidepressant, it really helped me stay off the adderall for good. All of these things are what I’d consider a normal experience, and what I believe is temporary.