My son has adhd and on 25 mg of d-amphetamine but his anger outburst towards the end of the day are getting worse. what type of dr should i see?

A thorough one: It is high dose of amphetamine. That could be part of the problem, . His appetite could be depressed and swings in blood sugar could be aggravating the anger out bursts. If he is having sleep issues that could be a problem at the end of the day. He needs a careful re-assessment with attention given to healthy life style, communication strategies, and triggers that cause reactions.