 [ Symptoms ] is adhd a chronic condition meaning medication will always be necessary  an 11yr old boy in my family has been taking medication for adhd for over 5 years i am aware that a usual side effect of his medication is loss of appetite which he experiences in a group of boys his age playing baseball he is one of the smallest boys are there alternative medicationstreatments that would improve his appetite and possibly allow him to reach a more normal heightweight i am concerned this heightweight difference is beginning to cause or will cause self image issues [ Disease ] two basic possibilities a food poisoning or what is sometimes called stomach flu and b some more lasting problem either way you need to stay hydrated and go see a doctor