Hi there, thanks for asking. As you mentioned tenex
is a medication for hyperactivity. It is safe at the age of 4. It can promote sleep and it is also good for ADHD
can be used in your kid if the doctor and you realize in the next ten years that he has phase delay sleep problem. It means if he has problem with sleeping at the regular time and he wakes up late but nothing else wrong. I wish him a good health.