I don't know about that specific medication but I would keep an eye on him and monitor his behavior. It could just be a lucky day or the meds may actually already be working. It all depends on the person. Also, if the meds work now they may start to wear off in a few months (especially past the 6th month mark) b/c its possible to become addicted and hormones can also affect meds depending on the child's age.
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Balance is needed within the universe, can be demonstrated in most/all concepts/things. Black/White, Good/Evil, etc.
All dependent upon your own perspective in your own form of existence, so trust your own gut and live the way YOU want/need to.