Why ADHD Kids Can't Sleep — and the Truth About Melatonin

My son has not taken a nap since he was nine months old. That's not an exaggeration.

For years, bedtime in our house was seven, sometimes eight. Pyjamas, teeth, lights out — everything the books said. And then he would lie in that bed, wide awake, until one, two, sometimes three in the morning. Not scared. Not calling out. Just… on.

I'm a physician. I have talked parents through their children's sleep for twenty years. And in my own dark hallway, at midnight, I had nothing. I thought I was doing something wrong. For a while, I thought he was.

We were both innocent. The problem was a clock.

You cannot discipline a clock

Every parent of a wired-at-night kid gets told: a better routine, less screen time, a firmer hand, a warmer bath. If your child is still awake at midnight, some adult somewhere has failed to be consistent.

But the control centre that runs about thirty percent behind in ADHD — the part that starts, stops, waits and holds a plan — also runs the internal body clock. Deep in the brain a timer decides when you get sleepy, by releasing melatonin. Think of melatonin as a signal, not a sedative: a quiet voice saying night is coming, start powering down.

In most people that voice speaks up a couple of hours before bed. In kids with ADHD it speaks up later — on average about forty-five minutes later in younger children, and closer to ninety minutes in teenagers and adults. Your twelve-year-old at nine p.m. is not fighting you. Biologically, for him, it is still early evening.

Melatonin: the bottle half of you already have

When our paediatrician first mentioned melatonin I did what most parents do. I gave a dose at lights-out, like a sleeping pill, at the dose printed on the bottle. It barely worked, and his nightmares were worse.

Melatonin doesn't knock a child out. It moves the clock. Used well, that means a small dose, given earlier — well before the bedtime you actually want — so the signal arrives when it should. The dose on the bottle is often far more than a child needs; more is not better, and it is not a substitute for a conversation with your child's own doctor, who should be the one setting dose and timing. Please don't start it off a video — including mine.

The three rogues of the night

• Light. The signal that starts the clock is darkness. Bright overhead light and screens at nine p.m. tell a late clock it's still afternoon.
• The medication tail. Some ADHD medications run into the evening. If the wind-down never starts, timing is a conversation for your prescriber, not a reason to stop.
• The midnight marketplace. Everything sold to exhausted parents at one a.m. — the gummies, the sprays, the apps. Most of it is priced on your exhaustion, not on evidence.

The one daytime lever

Morning light. A late clock is moved earlier by bright light in the first hour of the day — outside, if you can. It is free, it is boring, and it is the single most effective thing we changed. Work backward from the time you want him asleep: lights down, screens off, the signal, and the morning that moves the clock.