“She’s not bouncing off walls,” she said. “But she wasn’t bouncing off walls before either. She’s still quiet. Still dreamy. Her marks haven’t changed. The teacher says she’s fine.” She paused. “So is the medication actually doing anything?”

I hear this question every single week. And I’ll tell you what I told Mrs Naidoo: the problem isn’t the medication. The problem is that nobody told you what “working” looks like for a child like Priya.

This chapter is about the quiet child. The one who doesn’t disrupt the class, doesn’t get sent to the principal, doesn’t make anyone’s life obviously difficult. The one whose struggles happen entirely inside their head. If your child has the predominantly inattentive presentation of ADHD, this chapter will change how you measure medication, how you talk to your prescriber, and how you decide whether to continue.

The Truth: Two Very Different Children

To understand why measuring medication is so difficult for the inattentive child, you need to understand a fundamental difference between the two main presentations of ADHD.

The combined-type child is visible. They’re the one climbing furniture, interrupting the teacher, getting into scraps on the playground. Everyone notices. When medication works, everyone notices that too. The child stops running. Sits still. Raises their hand instead of shouting out. Teachers send home glowing reports within days. Parents feel enormous relief. The change is dramatic, obvious, and measurable from across a room.

Now think about the inattentive child. Before medication, she sits quietly at her desk. She looks like she’s listening. She’s not disruptive. She’s just… not fully there. Her mind wanders. She misses instructions. She stares out the window during maths. She forgets what she’s just read. Nobody sends her to the office. Nobody calls home in a panic.

After medication, she still sits quietly at her desk. She still looks the same from the outside. The disruption was always internal, not external. So the improvement is internal too. And that’s where the problem starts.

Research confirms exactly what I see in my consulting room. A direct observation study found that children with the inattentive presentation showed almost no visible change on the things parents and teachers actually look for — attention to activities, classwork completion, peer interaction, accuracy. The effects were barely measurable from the outside. Not because the medication wasn’t working neurologically. But because the improvement in an inattentive child is inherently subtle. You can’t easily see someone’s inner world becoming clearer.

The Reality: What Parents Get Wrong

The Grade Trap

This is the single biggest mistake I see parents make. They start medication and immediately watch the report card. When marks don’t jump, they conclude the medication isn’t working.

Medication improves your child’s ability to pay attention right now. It helps the brain focus, hold information, and filter out distractions in this moment. That’s what it does. That’s all it does. And that’s a great deal.

But grades reflect years of accumulated learning. Your child has been missing roughly 30 to 40 percent of classroom instruction for years. That’s like missing three to four months of school every year. Medication doesn’t go back and fill in those gaps. It gives your child the ability to absorb new information going forward. The gaps from years of missed learning? Those need tutoring, remediation, and time.

For the inattentive child, this gap is even wider. Their marks were probably mediocre rather than catastrophic before medication. They weren’t failing spectacularly. They were just consistently, quietly underperforming. A 45 percent average. Maybe a 50 on a good day. So the improvement on medication is also not spectacular. They go from 45 to 55. The parent sees “still struggling” rather than “meaningful improvement.”

You need to separate two questions. The medication question is: can my child’s brain now take in the information being presented? The remediation question is: does my child have the accumulated knowledge and skills to use that new ability effectively? These are different problems. They need different solutions.

The Dose Trap

Here’s something that surprises many parents and even some prescribers. Research shows that children with the inattentive presentation often respond best at lower doses of medication. Not higher. Lower.

In one important study, children with the combined type showed a clear pattern: higher doses worked better. But children with the predominantly inattentive presentation responded optimally at lower doses and got less benefit from pushing higher. Sixty percent showed significant improvement at the lower end of the dose range.

The clinical reality I see is this: parents of inattentive children don’t see dramatic change. They ask for a higher dose. The prescriber obliges. The child doesn’t improve further but starts getting side effects — less appetite, trouble sleeping, maybe some irritability. The parents then conclude the medication doesn’t work and stop it altogether.

In many cases, the child was already at their sweet spot. The problem wasn’t insufficient medication. The problem was that nobody explained what success looks like for this particular child.

The Perception Gap

Research into why parents continue or stop medication found something important. Short-term continuation is driven by visible symptom reduction. Parents of combined-type children see it immediately. Less running. Less shouting. Less chaos. That’s powerfully reinforcing.

Parents of inattentive children see… what, exactly? The child still sits quietly. Still seems distracted sometimes. Still isn’t bringing home perfect marks. The absence of dramatic visible change leads parents to conclude the medication isn’t working — even when it’s doing exactly what it’s supposed to do.

Not All Inattention Is the Same

This is newer research, but it matters enormously for some families.

There’s a growing understanding that some children with inattentive ADHD have what researchers call Cognitive Disengagement Syndrome. You might hear it described as sluggish cognitive tempo. These are the children who seem foggy, slow to process, almost sleepy in their inattention. They’re not daydreaming with an active, busy mind. They seem mentally sluggish, as though thinking through treacle.

Here’s why this matters: research shows that this sluggish, sleepy profile predicts a poorer response to standard stimulant medication. These children are more likely to be non-responders or to respond no better than they would to a placebo. The daydreamy child — the one whose mind is active but wandering — tends to respond much better to stimulants.

The difference may come down to brain chemistry. Standard stimulants primarily boost dopamine. But the sluggish, foggy presentation may involve different chemical pathways — norepinephrine or even serotonin — which is why stimulants alone may not be enough.

What does this mean practically? If your child seems genuinely foggy and sluggish rather than busy-minded and distractible, and they’re not responding well to stimulant medication, it’s worth discussing alternatives with your prescriber. Atomoxetine works on norepinephrine pathways and may be more relevant for this profile. Guanfacine is another option that some clinicians are finding helpful for this specific profile.

I raise this not to overwhelm you with options but to make an important point: if the first medication doesn’t seem to work, it doesn’t mean medication won’t work. It may mean you haven’t found the right medication for your child’s specific brain yet.

The Travelling Companions

Inattentive ADHD rarely travels alone. But its companions are different from the combined type.

Combined-type ADHD often brings along oppositional behaviour and conduct difficulties. These are loud, visible, impossible to ignore.

Inattentive ADHD tends to travel with anxiety, low mood, and learning difficulties. These are quiet. Internal. Easy to miss. And they complicate medication response in important ways.

Depression is particularly relevant. Research shows that low mood is a significant negative predictor of how well stimulant medication works. Since depression is more common in the inattentive population, you have a double challenge: the children most likely to have subtle, hard-to-measure responses are also the ones most likely to carry mood difficulties that further dampen medication effectiveness.

Anxiety adds another layer. The landmark MTA study — the largest treatment study ever conducted for ADHD — found that when anxiety travels alongside ADHD, behavioural approaches become nearly as effective as medication. For the inattentive child with significant anxiety, this means combined treatment — medication plus behavioural strategies plus addressing the anxiety directly — becomes essential. Medication on its own is less likely to produce results that satisfy anyone.

And then there are learning difficulties. A child can have both ADHD and a specific reading or maths difficulty. Medication will help the ADHD but won’t touch the learning difficulty. If you’re measuring medication success by reading improvement and the child has an undiagnosed reading difficulty, you’ll wrongly conclude the medication has failed.

The message here is straightforward. If medication doesn’t seem to be working well enough, before increasing the dose, ask: is there something else travelling alongside the ADHD that needs its own attention?

How to Actually Measure Whether Medication Is Working

This is the practical heart of this chapter. These are the strategies I give every parent of an inattentive child in my consulting room. Print this section. Stick it on your fridge. Bring it to your next appointment.

Step 1: Redefine “working” before you start

This is the single most important thing I can tell you. Before your child takes the first tablet, you need to know what to look for — and what not to look for.

Don’t look for dramatic behaviour change. Don’t look for sudden grade jumps. Don’t look for a “different child.” Don’t wait for the teacher to send home a glowing report. Don’t expect immediate homework compliance.

Do look for subtle internal changes your child might describe. “It’s quieter in my head.” “I can hear the teacher better.” “I don’t lose my place as much when I’m reading.” Your child may not volunteer this information. You need to ask. Specifically. Directly.

Step 2: Track what actually matters

Standard ADHD rating scales measure how severe the traits are. They’re useful for clinicians, but they miss the real picture for inattentive children. What you need to track are the things that affect daily life. Here’s what I suggest parents measure, week by week.

How long can your child sustain reading before they zone out? Time it. Actually time it. With a stopwatch if you need to. Before medication and after.

How many steps of a multi-step instruction can they hold? Test it. Give them a three-step request — “go upstairs, fetch your blue jersey, and bring me the TV remote on your way back” — and see how many steps they complete.

How many times do homework instructions need repeating? Count them. Not roughly. Actually count.

How long does the morning routine take, start to finish? Time it. Monday to Friday, first week without medication, first week with.

Are they losing fewer things? Track it. Lunch boxes. School jerseys. PE kit. Homework diaries.

Are they less frequently “surprised” by tests or assignments they forgot about?

None of these appear on any rating scale. But they’re measurable. They give you concrete data to bring to the follow-up appointment instead of a vague “I’m not sure if it’s working.”

Step 3: Ask your child directly

This is spectacularly underused. From around age eight or nine, children with inattentive ADHD can often describe their internal experience better than any teacher or parent can observe it from the outside.

Sit with your child. Not at homework time. Not when anyone’s stressed. Maybe in the car, or at bedtime, or over a milkshake on Saturday. And ask:

A child saying “School feels a bit easier” is meaningful clinical data, even if the teacher hasn’t noticed any change. Teachers often don’t notice the quiet child improving. Your child’s own words, combined with your tracking at home, give a much richer picture than a teacher rating scale ever will.

Step 4: The Saturday Test

Here’s a practical tool I love. Pick a Saturday when your child hasn’t taken medication. Observe. Then pick a Saturday when they have. Observe again. But take school out of the equation entirely. No academic pressure. No homework.

Can they follow a recipe with you? Can they sustain a board game without drifting off? If you send them to fetch something from their room, do they come back with it — or stand in their doorway wondering why they’re there? Can they complete a household task without three reminders?

Functional improvement in a low-pressure environment is often much easier to see than improvement at school, where your child may still be struggling with years of accumulated knowledge gaps regardless of medication. The Saturday test strips away all the noise and lets you see the medication effect more clearly.

Step 5: Watch the timeline

Research shows that early response at around three weeks predicts long-term outcome. So here’s what I tell parents: if we don’t see something by three weeks, we need to re-evaluate. But “something” for an inattentive child might be your child saying “school feels a bit easier” rather than the teacher sending home a certificate.

Give it three weeks of consistent use at the prescribed dose. Not three days. Not one difficult Monday. Three weeks. Then sit down with your tracking data, your child’s own words, and your Saturday test observations. That’s the conversation to have with your prescriber.

Step 6: Separate the medication question from the catch-up question

This is critical. I’ve said it before in this chapter but I’m saying it again because it’s the thing parents most often get wrong.

The medication question: can my child’s brain now access the information being presented in front of them?

The catch-up question: does my child have the accumulated knowledge and skills to use that access effectively?

If your child has been missing 30 to 40 percent of instruction for years, medication gives them the ability to absorb new material. It doesn’t backfill the gaps. Medication is working if your child is now learning new things. Marks may still lag because they’re catching up on years of missed learning. That’s a separate problem. It needs tutoring, educational support, and accommodations alongside the medication. Not instead of it. Alongside it.

When to Reassess Rather Than Increase the Dose

Before I let you go to the Quick Win section, there are some warning signs I want you to know about. These suggest it’s time for a conversation with your prescriber about adjusting the approach, not just pushing the dose higher.

Your child reports no subjective improvement at all after three to four weeks at an adequate dose. Not even “a little bit easier.” Nothing. That’s worth discussing.

Improvement appears in one area but not others. For example, your child can sustain reading much longer but still can’t do maths. This may point to a co-existing learning difficulty rather than medication failure. The medication may be doing its job perfectly — the maths problem might need its own investigation.

Side effects are increasing without corresponding benefit. If appetite is dropping, sleep is suffering, and mood is worsening but focus isn’t improving, the dose may already be past the sweet spot. Remember: for inattentive children, the optimal dose is often lower than you’d expect.

The teacher reports no change but you notice your child seems “more present” at home. This doesn’t mean medication isn’t working. It may mean the school environment has additional barriers — knowledge gaps, a poor match with the teaching style, unaddressed anxiety — that need attention beyond medication.