How is ADHD Combined Type Different from Inattentive ADHD? 

The three recognised types of Attention Deficit/Hyperactivity Disorder ADHD are inattentive, hyperactive-impulsive, and ADHD combined type. This article focuses on the two most confusing subtypes: inattentive ADHD and combined ADHD. We will explore how these types differ in terms of symptoms, diagnosis, treatment, and how they manifest in everyday life. Getting an assessment is the first step towards receiving support, whether through the NHS or a private provider. You can take a free self-screening test online, which takes around 5–10 minutes, to check whether you may be showing signs of adult ADHD. 

What Is Inattentive ADHD? 

Inattentive ADHD, often referred to as the inattentive type, primarily affects organisation, memory, and focus, without the outward signs of hyperactivity. It is often harder to detect, especially in girls and women who may appear quiet, anxious, or simply “daydreamy”. People with this type often struggle with concentration, planning, and completing tasks, which can lead to underachievement despite strong potential. Many are not diagnosed until adulthood . 

What Is Combined ADHD? 

Combined ADHD is diagnosed when a person meets criteria for both inattentive and hyperactive‑impulsive symptoms. This means impulsivity, restlessness, and emotional intensity are common in someone with ADHD combined, and they may also have trouble focussing and staying still. In both adults and children, it is the most frequently diagnosed subtype. 

Core Differences in Symptoms 

Although both types fall under the ADHD umbrella, their symptoms show differently in everyday life. 

Inattentive Type Symptoms  

• Distractibility: Difficulty maintaining focus, particularly when performing repetitive or low-stimulation tasks. 

• Forgetfulness: Frequently misplaced items, missing deadlines, or forgetting conversations. 

• Disorganisation: Has trouble organising tasks, planning, and adhering to schedules. 

• Mental Fatigue: Easily overpowered by hectic situations or multitasking. 

Combined Type Symptoms  

Includes all inattentive symptoms plus: 

• Restlessness and fidgeting: The urge to move, wriggle, or tap all the time. 

• Impulsivity: Talking over other people or acting rashly. 

• Excessive talking: Having trouble waiting their turn in a conversation or finding quiet time. 

• Emotional reactivity: Intense emotional responses that feel disproportionate or difficult to manage. 

If someone identifies traits from both categories, they may meet criteria for ADHD combined. Recognising this combination helps guide treatment and support. 

How These Types Affect Daily Life 

Both subtypes can impact school, work, and relationships, but often in different ways. People with inattentive ADHD may appear quiet, withdrawn, or inconsistent. Many times, especially for women who might internalise their problems, they hide symptoms. Emotional effects may include self-doubt, anxiety, or a persistent sense of falling short. Those with ADHD combined type, on the other hand, may display more overt signs of irritability. Their emotional swings can sour personal relationships, and their impulsivity and energy might be misinterpreted as immaturity. Men with ADHD combined type may externalise their symptoms more, while women may alternate between masking and emotional tiredness. Understanding these patterns helps make sense of behaviours that others may misunderstand and offers a pathway toward compassion and change. 

Diagnosis and Assessment Options 

Diagnosing inattentive ADHD or ADHD combined type involves a clinical process: 

• Structured interviews 

• Behaviour checklists 

• Symptom tracking across different environments (home, school, work) 

In a combined ADHD assessment, both hyperactivity and impulsivity are specifically evaluated. Wait times for NHS assessments can be lengthy, sometimes lasting up to two years. Some individuals can access quicker NHS-funded options (3–12 months). Through ADHD Certify, you can also schedule a private ADHD assessment, and you can frequently be seen in the same month 

Treatment for Inattentive vs Combined ADHD 

Both subtypes may benefit from the same medications, including: 

• Methylphenidate 

• Lisdexamfetamine 

• Atomoxetine (a non-stimulant option) 

However, behavioural strategies often differ: 

• Inattentive ADHD responds well to tools that support focus like digital reminders, prioritisation methods, and quiet working spaces. 

• ADHD combined treatment often includes calming routines, sensory support, and emotional regulation training. 

Therapies such as CBT and executive function coaching are beneficial for both types of therapy. Tailoring support to the person’s primary challenges makes a significant difference. 

Living with Inattentive or Combined ADHD 

There’s no one-size-fits-all solution but understanding your type can help you support your brain more effectively. Consider Anna, who was always “lazy” and routinely missed appointments and birthdays. Discovering she had inattentive ADHD helped her embrace tools like calendar blocking and reminder app. Then there is Lee, who couldn’t sit through meetings and interrupted constantly. His diagnosis of ADHD combined resulted in improved self-awareness, emotional coaching, and a sensory-friendly office. Living with either type is entirely manageable with the right framework, self-awareness, and support network. Effective long-term plans abound for support groups, therapy, and coaching. The road runs more smoothly the earlier you start. 

Final Thoughts 

ADHD combined type and inattentive ADHD share some traits but differ in how they present and impact daily life. One is more subtly chaotic, the other more obviously restless. Knowing which profile fits will enable you to feel more in control and access focused treatment. If you are ready to explore whether ADHD applies to you, you can arrange a private assessment and learn more through ADHD Certify.