"Why Do I Interrupt People Even When I’m Trying Not To?" Understanding Impulsivity in ADHD

One of the ADHD symptoms that can cause particular difficulty in relationships is interrupting.

Someone else is halfway through a sentence and you already know what you want to say. Before you have consciously decided to speak, the words are out. You realise immediately, apologise and promise yourself that next time you will wait.

Then you do it again.

This can be frustrating for everyone involved. The other person may feel that they are not being listened to, while the person with ADHD may feel embarrassed because they genuinely were listening and genuinely did not intend to interrupt.

It is tempting to explain this simply as impatience or poor manners. In ADHD, however, interrupting can be one expression of a broader difficulty with impulsivity: the ability to create enough space between an urge and an action to decide what to do next.

What Does Impulsivity Actually Mean?

When people hear the word "impulsive", they sometimes imagine dramatic behaviours such as reckless driving, excessive spending or making major decisions without thinking. These can certainly occur, but impulsivity is often much more ordinary.

It can mean answering a question before somebody has finished asking it, joining a conversation at the wrong moment, buying something without considering whether you really need it or sending a message and immediately wishing you had worded it differently.

For children, it might appear as shouting out an answer in class, struggling to wait for a turn or repeatedly joining another child's game without noticing whether the timing is appropriate.

The common feature is not that the person is incapable of understanding the consequences. Often, they understand them perfectly well afterwards. The difficulty is getting that information involved early enough to influence the behaviour.

"If I Don't Say It Now, I'll Forget"

There can be another reason people with ADHD interrupt conversations.

They are trying to listen to what somebody is saying while simultaneously holding their own thought in mind. Because working memory can be less reliable in ADHD, there may be a genuine feeling that the thought will disappear if it is not expressed immediately.

This creates a difficult choice. Either say it now and risk interrupting, or continue listening and risk completely forgetting what you wanted to say.

Sometimes the person then spends so much effort mentally repeating their thought that they stop properly listening anyway.

This can create the strange situation where interrupting may actually arise partly from an attempt to remain engaged in the conversation rather than from a lack of interest in what the other person is saying.

Excitement Can Make It Worse

Interrupting is not always driven by impatience.

Sometimes it comes from enthusiasm.

Someone tells you something that reminds you of a similar experience and your brain immediately makes the connection. You want to share it. The conversation feels interesting and stimulating, and ideas begin arriving quickly.

From your perspective, you may be showing engagement. You are contributing because you are interested.

From the other person's perspective, however, it can feel as though you have taken over their story and made it about yourself.

Both experiences can be true at the same time.

Understanding the ADHD mechanism can explain why it happens, but it is still important to recognise how it may feel to the person on the receiving end.

Impulsivity Isn't Only About Talking

The same difficulty can appear in many other parts of life.

Someone sees something online and buys it before considering whether they can afford it. They receive an irritating message and reply immediately while angry. They agree to a plan before checking their diary. They change direction while driving because something catches their attention. They make a joke and realise a second later that it was probably not the right moment.

In each case, there is a very short distance between thought and action.

Most people experience impulses. The difference in ADHD is that inhibiting or delaying the response can be more difficult and may require considerably more conscious effort.

This is one reason why simply telling someone to "think before you act" can be frustrating. They often know that already.

The challenge is creating enough of a pause for the thinking to happen.

Why Can Someone Control It Sometimes?

This is a question that frequently causes misunderstanding around ADHD.

If somebody can sit quietly during an important job interview, why do they interrupt constantly at home?

If a child manages not to shout out when the headteacher visits the classroom, why can't they do it during an ordinary lesson?

ADHD symptoms are not necessarily present at exactly the same intensity in every situation. Novelty, consequences, interest, structure and the amount of conscious effort being used can all affect how someone functions.

A person may be able to monitor themselves extremely closely for an important meeting and then find that this control becomes much harder later in the day when they are tired and relaxed with their family.

Being capable of controlling an impulse sometimes does not necessarily mean that controlling it consistently is easy.

Understanding Isn't the Same as Excusing

This distinction is particularly important when ADHD affects other people.

If somebody repeatedly interrupts their partner, the partner is allowed to find that frustrating. If impulsive spending affects household finances, understanding the ADHD behind it does not make the financial consequences disappear.

A diagnosis should help us understand a behaviour well enough to manage it more effectively. It should not mean that every behaviour automatically becomes acceptable.

In fact, understanding the mechanism can make responsibility more practical.

Instead of saying, "I'm just impulsive, that's my ADHD," the more useful question becomes, "I know impulsivity is difficult for me, so what can I put in place to reduce the problems it causes?"

Creating a Little More Space

For conversational interrupting, the goal is often not to eliminate spontaneity. It is to create a slightly longer gap between having the thought and saying it.

Some people find it useful to deliberately pause for a moment when another person stops speaking rather than immediately filling the silence. Others may briefly note down an important point during meetings so they do not feel they must say it immediately before forgetting it.

In close relationships, it can also help to talk openly about the pattern. A partner might have an agreed, gentle way of signalling that an interruption has happened without turning every conversation into an argument.

For other forms of impulsivity, the strategy may be different. Online purchases might have to remain in the basket until the following day. An angry message might be written but not sent immediately. Important financial decisions might require discussion with somebody else first.

The principle is similar in each case: if your brain struggles to create the pause internally, sometimes you can build the pause into the environment instead.

Medication Can Help, but It Isn't the Whole Answer

For some people with ADHD, appropriate medication improves impulsivity considerably. They may describe having slightly more time to think before responding or finding it easier to resist an immediate urge.

That can make an important difference.

Medication does not, however, automatically undo years of habits or solve every communication difficulty. Someone may still benefit from learning to recognise situations where impulsivity causes problems and developing practical strategies around them.

As with many aspects of ADHD treatment, the best results often come from understanding both the brain and the environment around it.

A Final Thought

People with ADHD are sometimes described as though they simply need to think before they speak.

Many of them would agree.

The difficulty is that the thought and the speaking can sometimes happen almost simultaneously.

Understanding this does not mean that interrupting no longer matters. Conversations work best when both people have space to speak, and repeated interruptions can understandably leave somebody feeling unheard.

But criticism alone rarely teaches the brain how to create that missing pause.

A more useful starting point is recognising what is actually happening.

Perhaps you are excited.

Perhaps you are frightened that you will forget your thought.

Perhaps the response simply escapes before the internal brake has had enough time to engage.

Once you understand the pattern, you can begin creating that pause deliberately.

Sometimes it might only be a second or two.

But for an impulsive brain, those couple of seconds can be the difference between having a thought and automatically acting on it.

Dr James Glass
MBChB MRCPsych
Medical Director, WMI Psychiatry