Hyperactive-Impulsive ADHD vs Inattentive ADHD: The Complete Guide to Symptoms, Behaviour, and Treatment 

ADHD is divided into three subtypes: inattentive, hyperactive-impulsive, and a combination of both. Although the two forms of ADHD are combined, this guide concentrates on inattentive vs hyperactive-impulsive ADHD since these are the least well understood.  

 Being able to distinguish between these two conditions is very important, since adults and women are often misdiagnosed or overlooked. They might both have the main characteristics of executive dysfunction, but their outward symptoms, how they act and how they are treated, can be very different.  

 Whether it’s a child who’s constantly on the move or an adult quietly struggling with focus, identifying the differences between hyperactive-impulsive ADHD and inattentive ADHD can make a real difference in diagnosis, treatment, and support. 

What Is Inattentive ADHD? 

Inattentive ADHD can be very difficult for a person to focus on tasks, finish them, or keep things organised. Unlike hyperactive presentations, these people normally keep quiet, seem to be in a trance, and are hard to reach.  

 Most people affected by this type are women or girls, many of whom feel symptoms inside them, never act them out openly. Due to this, many people with ADHD have their condition, especially this form, left unrecognised and untreated. Want a full breakdown? See our guide on “What is Inattentive ADHD.”

What Is Hyperactive-Impulsive ADHD?

People with hyperactive-impulsive ADHD are very active, restless and act without thinking, always needing to be entertained. Children usually show this condition clearly and it may not be so obvious in adults, who might be talkative or act on sudden decisions.  

 It is most often seen in boys in school, however, females may also be diagnosed with it, though their signs can be concealed by social norms. For a full explanation, see “What is Hyperactive-Impulsive ADHD?”

Key Behavioural Differences 

Even though ADHD includes these, their day-to-day behaviours are not the same. This is how inattentive ADHD behaviour and hyperactive-impulsive ADHD behaviour usually differ for people as they age: 

Behavioural Area	Inattentive ADHD (Child & Adult)	Hyperactive-Impulsive ADHD (Child & Adult)
Activity Level	Lack of energy may be shown as being lazy or letting things move slowly.	Restless, unable to sit still, always “on the go”
Impulse Control	May put off or ignore certain duties, instead of quickly jumping into action	Acts without thinking; cuts off the conversation or other’s activities
Social Interaction	Sometimes it appears like they are not interested, shy or are not paying attention during talks.	Can often be very talkative and take over a group conversation
Attention Span	Has a hard time paying attention and doing what is asked	Impatient, hard to focus because of internal restlessness
Emotional Regulation	Overwhelmed, the person tends to hide their frustration.	More likely to have sudden emotional outbursts

These behaviours can transfer with age. For example, hyperactive-impulsive ADHD in adults usually overcommit and have a hard time relaxing, while inattentive ADHD in adults might be shown as trouble paying attention during group discussions. Hyperactive-impulsive ADHD in children, the same issues appear as variations in how they behave in school and interact with fellow students, while inattentive ADHD in children might be shown as difficulty maintaining attention in play or task. 

Symptom Breakdown: Side by Side 

Here is a clear comparison of the symptoms inattentive ADHD symptoms and hyperactive-impulsive ADHD symptoms, based on problems often seen in reality: 

Inattentive ADHD Symptoms 

• Frequently overlook things (phones, keys, homework) 

• It looks like they are not focused on the teacher or class. 

• Difficulty maintaining attention in play or task. 

• Difficulties with being organised and managing time.  

• Avoids activities that take a great time of focus. 

• Frequently makes simple mistakes in assignments, homework, or tasks.  

Hyperactive-Impulsive ADHD Symptoms 

• Constant stop moving or tapping things 

•  Interrupts others or talks excessively 

• Moves from the seat or about the room when they are supposed to remain seated 

• Acts without considering results 

• Having challenges when others talk and when they have to wait their turn 

• Often feels the need to fill quiet moments by keeping busy 

Two sets of symptoms which cause daily problems must be present for the diagnosis. DSM-5 states that the symptoms must be seen before age 12 and show up across different places, including home, school or job. 

Shared Traits and Overlaps 

Regardless of their differences, inattentive and hyperactive-impulsive ADHD types show basic difficulties with memory, emotional regulation, and memory. These common ADHD traits can affect self-esteem, professional or academic performance, and relationships. 

Shared ADHD symptoms may include: 

• Poor task completion and initiation  

• Difficulty maintaining emotions 

• Time awareness problem 

• Not being able to maintain motivation 

Women are more likely to internalise their challenges. They can learn to hide their issues using strategies such as lists, routines or perfectionism, so it often takes longer to correctly identify the problem, or they are labeled with anxiety or depression. 

Diagnosis: How Doctors Distinguish the Two 

In DSM-5, doctors diagnosed ADHD consists of clinical criteria, symptom history, and behavioural observation. Clinicians assess: 

• Consist of at least 6 symptoms in children (5 in adults) 

• Symptom duration of 6 months or more 

• Onset before 12 ages 

• Impaired function in multiple areas of life 

To differentiate inattentive ADHD women from those with hyperactive or combined types, clinicians may ask targeted questions about coping strategies, emotional fatigue, and internal focus. Similarly, hyperactive-impulsive ADHD women may exhibit hyperactivity instead of displaying physical restlessness. Though formal evaluation may include history from family, partners, and teachers, self-reporting plays an important role, especially for adults. 

Note: ADHD-C (the combined type) appears when a person has both inattentive and hyperactive symptoms 

Treatment Approaches for Each Type 

Although the general treatment of ADHD options work for all types, plans can be individualized according to what someone experiences and their life circumstances. 

Medication 

• Stimulants (e.g. methylphenidate, amphetamines): are both often the first drugs used for either type of ADHD 

• Non-stimulants (e.g. atomoxetine): It may be chosen when anxiety is another issue or when stimulants prove problematic 

• If the main symptom is cognitive (being inattentive) or behavioural (acting impulsively), the doctor may adjust the dosage. 

Therapies 

• Cognitive Behavioural Therapy (CBT): Helps with coping mechanisms and thought processes. 

• Executive Function Coaching: Targets organisation, how to handle your responsibilities and follow-through. 

• Behavioural Therapy (especially in children): Helps to strengthen good behaviours and gain control of their impulses  

Lifestyle Adjustments 

• Structured routines with reminders or visual aids 

• Dividing and prioritising tasks for people who are easily distracted 

• Physical activities (e.g. sports, walking, meetings) for hyperactive-impulsive ADHD treatments 

Adaptation matters; suitable care for one individual could be very different from what is best for another, especially when these people need help with emotions and overlapping conditions.  

Daily Life with Inattentive vs. Hyperactive-Impulsive ADHD 

A person with ADHD experiences challenges in school, friendships and their job. 

Inattentive ADHD Child 

• An ADHD child who is not paying attention  

• Often misunderstands instructions or forgets homework. 

• Can sometimes appear “out of sight” in school activities. 

• Difficulties with social life because of how distracted or lose in interest they appear 

Hyperactive-Impulsive ADHD Child 

• Interrupts classmates or frequently get up during lessons. 

• May be labelled as defiant or disruptive 

• Performs well in situations that involve activities. 

Inattentive ADHD Adult 

• May struggle with time management or career consistency 

• Constantly dealing with assignments that require several steps 

• Frequently suffers from stress about not living up to expectations 

Hyperactive-Impulsive ADHD Adult 

•  Act impulsively at work or may talk over others in meetings 

• May shout out their own opinions first in a meeting or act on impulse at work 

• Often starts several projects at once and doesn’t finish any of them 

Recognising needs and using helpful strategies can make life better for anyone, regardless of illness. 

Final Thoughts 

It starts with recognising if symptoms are more related to inattention or hyperactivity-impulsive ADHD before giving support. Managing either type effectively can be done using the right protocols, which may be medication, therapy, coaching, or a solid routine.  

If any of these symptoms seem familiar, consider looking for a professional consultation. Early diagnosis, especially for women and adults, can make a huge difference. 

Do you think you might have ADHD? Take a free self-assessment tool to get started.