does your friend work? if so, his employer may offer EAP, in which case he could talk to a professional about this. if he goes to school, the school might offer some amount of free counseling as well.
i went to see someone when i had a non-cannabis related panic attack back in college, and what we talked about during that one session i still apply to this day, almost a decade later. i even apply it to when i smoke and my heart rate gets elevated, causing me to start feeling panicked.
also, if he is not in school or working (or if his work does not offer EAP), there are many clinics around that will offer mental health providers. i highly suggest that he consider this route.
by the way, who do you suppose chanicekobolowski might be?