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Conditions

Conditions & Differentials

Half of adults with ADHD have at least one other condition, and several conditions can look like ADHD without being it. These pages explain, condition by condition, how a clinician tells them apart, what treatment order usually looks like, and what to tell the assessing clinician.

38 clinician-reviewed answers

Conditions

ADHD and binge eating disorder: what gets treated first?

When ADHD and binge eating disorder happen together, treatment planning depends on which problem is more urgent and on a full assessment of both.

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Can ADHD and PMDD happen together, and how does that affect treatment?

Yes. ADHD and PMDD can happen together. Tracking symptom timing across cycles helps clinicians coordinate ADHD care and premenstrual symptom treatment.

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Can an adult have both FASD and ADHD, and what should they disclose in an assessment?

Yes, an adult can have both FASD and ADHD. Learn what to disclose in an ADHD assessment, including developmental records and prenatal exposure history.

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Can stimulant treatment worsen tics if I have ADHD and Tourette syndrome?

Stimulant treatment does not always worsen tics in ADHD and Tourette syndrome. Learn what evidence says, how monitoring works, and when options change.

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Can you have both ADHD and autism as an adult, and which condition should be treated first?

Yes, adults can have both ADHD and autism. Treatment usually starts with the condition causing the biggest day-to-day risk or impairment.

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How are ADHD and Tourette syndrome told apart in adults with restlessness or impulsive movements?

ADHD and Tourette syndrome can look similar, but tics have a premonitory urge, brief pattern, and suppression history that differ from hyperactivity.

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How do clinicians approach ADHD assessment in adults with an intellectual disability?

Clinicians assessing ADHD in adults with an intellectual disability rely on collateral history, adaptive functioning, and careful symptom interpretation.

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How do clinicians assess ADHD when substance use may also affect attention?

Clinicians assess ADHD alongside substance use by reviewing childhood history, impairment across settings, timing, and other possible causes.

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How do clinicians assess attention problems after childbirth, including ADHD and postpartum conditions?

Clinicians assess attention problems after childbirth by reviewing developmental history, impairment, timing, and postpartum explanations, including ADHD.

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How do clinicians assess attention problems when an adult has an eating disorder history?

How clinicians assess attention problems in adults with an eating disorder history, including development, impairment, timing and alternatives.

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How do clinicians check whether hearing or vision problems are contributing to attention difficulties?

Clinicians check whether hearing or vision issues may be contributing to attention difficulties by reviewing history, impairment, timing, and alternatives.

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How do clinicians check whether thyroid problems are contributing to attention difficulties?

Clinicians check whether thyroid problems may be contributing to attention difficulties by reviewing history, timing, settings, impairment and alternatives.

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How do clinicians coordinate care when ADHD and borderline personality disorder coexist?

When ADHD and borderline personality disorder coexist, clinicians coordinate care by reviewing history, impairment, timing and alternatives.

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How do clinicians evaluate brain fog when ADHD and perimenopause may both contribute?

Clinicians assess brain fog by looking at developmental history, impairment across settings, timing over time, and other possible causes.

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How do clinicians evaluate coordination and attention difficulties when adult ADHD or developmental coordination disorder is suspected?

Clinicians assess whether ADHD, developmental coordination disorder, or both best explain coordination and attention difficulties over time.

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How do clinicians evaluate overlapping ADHD and borderline personality disorder symptoms in adults?

Clinicians assess overlapping ADHD and borderline personality disorder symptoms using developmental history, impairment, time course and alternatives.

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How do clinicians plan treatment when adults have both ADHD and OCD?

How clinicians plan treatment when adults have both ADHD and OCD, including history, impairment, symptom timing, and alternatives.

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How do clinicians review medication side effects when assessing attention problems?

Clinicians review medication side effects, ADHD history, symptom timing, impairment across settings, and other possible causes of attention problems.

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How do clinicians separate ADHD from brain fog caused by chronic pain or pain medication?

Clinicians separate ADHD from pain-related brain fog by looking for lifelong ADHD patterns versus attention problems that track pain flares or sedating medicines.

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How do clinicians separate ADHD from long COVID concentration problems?

Clinicians separate ADHD from long COVID brain fog by looking at timing, fatigue, post-exertional worsening, and childhood ADHD evidence.

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How do clinicians tell ADHD and autism apart in adults during a virtual assessment in Canada?

How clinicians separate ADHD from autism in adult virtual assessments in Canada, using social patterns, restricted interests and history.

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How do clinicians tell ADHD and PMDD apart when concentration drops before a period?

Clinicians look at history, settings, timing and alternatives to tell ADHD and PMDD apart when focus drops before a period.

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How do clinicians tell ADHD from a learning disability in adults?

Clinicians separate ADHD from learning disability by looking for broad executive problems versus specific academic skill deficits.

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How do clinicians tell ADHD from grief-related brain fog after a major loss?

Clinicians tell ADHD from grief-related brain fog by looking at timing, pre-loss symptoms, sleep disruption, and whether attention problems existed before the loss.

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How do clinicians tell ADHD from lingering concussion symptoms in adults?

Clinicians separate ADHD from lingering concussion symptoms by looking at timing, head injury details, pre-injury history, and red flags after concussion.

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How do clinicians tell ADHD from major depression when both cause poor concentration?

Clinicians separate ADHD from major depression by looking at lifelong attention patterns, episodic mood change, anhedonia, and slowed thinking.

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How do clinicians tell sensory processing issues from ADHD distractibility?

Clinicians separate sensory processing issues from ADHD by looking for specific sensory triggers, over-responsivity, and broader executive function patterns.

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How do you tell ADHD from PTSD in adults who have concentration problems?

ADHD and PTSD can both disrupt focus, but clinicians look for lifelong ADHD patterns versus trauma triggers, avoidance, hypervigilance and flashbacks.

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How is ADHD treatment sequenced if someone also has postpartum depression or anxiety?

ADHD treatment after birth is usually sequenced by urgency: stabilize postpartum depression, anxiety, sleep, and feeding plans first, then adjust ADHD care together.

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How is treatment planned when someone has both ADHD and perimenopause symptoms?

Treatment planning for ADHD with perimenopause usually starts with sleep, mood, hormone review, and coordinated primary care, then ADHD management.

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If I have ADHD and anxiety, which condition should be treated first?

Usually, the condition causing the biggest current impairment is treated first. ADHD and anxiety are often treated together, with therapy helping decide the sequence.

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If I have both ADHD and chronic pain, which condition is usually treated first?

Usually, the condition causing the biggest safety or day-to-day problem is treated first when ADHD and chronic pain occur together.

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If more than one condition could explain my symptoms, can I still get an ADHD diagnosis?

Yes. ADHD can be diagnosed even when other conditions may also explain symptoms, if full criteria are met and other causes are assessed.

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Should PTSD be treated before ADHD medication is started?

PTSD does not always need to be treated before ADHD medication. Safety, sleep, hyperarousal, and trauma symptoms help decide whether to stabilize first or treat both together.

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What does an ADHD clinician need to know if I have a seizure disorder?

An ADHD clinician needs clear seizure history, medication details, and neurologist input so treatment choices and safety considerations are reviewed carefully.

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What should I tell an ADHD assessor if I think my focus problems are actually OCD?

Tell the assessor if your focus problems come with intrusive thoughts, rituals, or obsession-compulsion patterns, not just distractibility.

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What should I track before an ADHD assessment if I think hormones affect my symptoms?

Track cycle timing, sleep, mood, focus changes, and treatment changes before an ADHD assessment if hormones seem to affect symptoms.

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Which condition gets treated first: ADHD or substance use disorder?

When ADHD and substance use disorder occur together, treatment usually starts with the more urgent risk, often both in parallel with safety planning.

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