2 doctors weighed in:

What are the symptoms of having hyperphenylalaninemia?

2 doctors weighed in
Dr. Jay Park
Pediatrics
1 doctor agrees

In brief: See below

Vomiting is an early symptom. Hyperactivity, unintentional movements, rhythmic rocking, and mental retardation are frequently noted in children.

In brief: See below

Vomiting is an early symptom. Hyperactivity, unintentional movements, rhythmic rocking, and mental retardation are frequently noted in children.
Dr. Jay Park
Dr. Jay Park
Thank