ADHD and Addiction: How a Dual Diagnosis Assessment Works

An adult ADHD diagnosis requires evidence that several symptoms were present before age 12, so a dual diagnosis assessment for ADHD and a substance use disorder depends on records and outside accounts, not only on how a person feels in the room today. According to NIMH, adults need five or more symptoms of inattention or of hyperactivity and impulsivity, lasting at least six months, across more than one setting. That is why the most useful thing you can do before an assessment at Annandale Behavioral Health is gather the paperwork and the people who can describe your childhood.

Why ADHD and addiction are assessed together

Annandale is a small private residence in the Los Angeles and Pasadena area, licensed to treat substance use disorders. We treat ADHD only as a co-occurring condition in someone who is also being treated for alcohol or drug use. The two can look alike. Alcohol, stimulants, cannabis and withdrawal itself can all disrupt attention, sleep, memory and mood, so a person who is two weeks out from heavy use may score as inattentive on any checklist. The National Institute on Drug Abuse describes co-occurring mental health conditions and substance use disorders as common and as best addressed together rather than one after the other. A careful assessment tries to separate what was there before substances from what substances have caused.

How ADHD and substance use can feed each other

Clinicians describe several routes by which the two conditions tangle. These are patterns seen in practice, not guarantees for any one person.

Self-medication: some people discover that alcohol quiets a restless mind at night or that a stimulant finally makes a task feel possible, and use hardens into habit.

Impulsivity: acting before thinking can make it harder to stop at one drink or to turn down an offer.

Sleep disruption: poor sleep worsens attention, and alcohol and stimulants both damage sleep, which can create a loop.

Unstructured time: adults who struggle with planning may find evenings and weekends the riskiest hours.

Shame and missed diagnosis: years of being called lazy or careless can push people toward whatever relieves the feeling, and the NIMH ADHD overview notes that girls and women are especially likely to be missed in childhood.

What the assessment usually involves

The process is procedural, and knowing the steps in advance makes it far less intimidating. The details vary by clinician, but a thorough dual diagnosis assessment generally includes the following parts.

Substance history: a timeline of what you use, how much, how often, and when you last used, because the clinical team needs to know what is in your system before judging attention symptoms.

Developmental history: questions about school, work and relationships going back to childhood, aimed at whether symptoms predate substance use.

Standardized symptom screening: rating scales and a structured interview, interpreted by a licensed clinician and never treated as a diagnosis by themselves.

Medication and prescription review: every current and past prescription, including stimulants, sleep aids and anti-anxiety medication, checked against what your pharmacy and prescriber report.

Collateral information: accounts from a parent, partner, sibling or old friend, and any school or medical records that still exist.

Other conditions: screening for depression, anxiety, trauma and sleep problems, which often occur alongside ADHD.

Why timing matters

Many people ask to be assessed for ADHD on day one of treatment. In our experience, the more reliable picture comes after the body has stabilized. Assessing too early risks two opposite errors: labeling withdrawal-related restlessness as ADHD, or dismissing real, long-standing ADHD as just a side effect of drinking or drug use. A residential setting helps because staff see sleep, concentration and routine over days and weeks rather than a single appointment. Anyone who may be physically dependent on alcohol or benzodiazepines should not stop on their own to make an assessment cleaner. Withdrawal from both can cause seizures and requires medical supervision.

The stimulant medication question

If you have been prescribed a stimulant, or have used someone else’s, tell the team plainly. Prescribing decisions for a person with a substance use disorder are made by a licensed prescriber, who weighs the history of use, the type of substance involved, and the available non-stimulant options. Nobody at Annandale will promise a particular medication in advance, and a clinician reviewing your case may reasonably take a cautious approach. Honest reporting is protective: gaps in a medication history are one of the most common reasons an assessment takes longer than it needs to. Our guide to psychiatric medications and what to bring to admission explains how to document what you take.

What to do this week

Here is something concrete you can do today. Write down three names of people who knew you before age 12 and could describe how you did at school, then ask one of them whether they still have report cards, teacher comments or old evaluations. Next, list every medication you have taken in the last two years, with doses and prescriber names, and note the date and time of your last drink or last dose of anything. Bring the list to the call. Our walk-through of the admissions screening call shows what else to have ready, and why the last drink and last dose matter at intake covers the timing questions.

What if records no longer exist?

Many adults cannot find a single report card. That does not close the door on assessment. Clinicians can lean on interviews, family recollections and observation over time. What matters is being honest about what you do and do not remember, and not inventing details to seem more credible. A clinician would rather hear “I don’t know” than a confident guess. Family members can help by writing down specific memories, such as how homework went or what teachers said at conferences, rather than general impressions. Specific, dated recollections carry more weight than sweeping statements.

What treatment looks like once the picture is clear

When ADHD is confirmed alongside a substance use disorder, treatment plans usually combine addiction care with skills for organization, routines and impulse control, plus medication decisions where clinically appropriate. Our small six-bed residence allows the team to notice patterns in daily structure, such as missed morning routines or trouble finishing tasks, and to adjust the plan. You can read more about how we approach dual diagnosis treatment in Los Angeles. If a substance use disorder is not part of your situation, we are not the right program, and we will say so.

Planning for life after residential care

ADHD does not end when a residential stay does, so a good plan covers the ordinary weeks afterward. That can mean a written daily routine, reminders for appointments and medication, a named outpatient prescriber before discharge, and a short list of people to call when evenings feel unstructured. Ask your team to put these in writing before you leave, and ask who will refill any prescription and when the first follow-up visit is scheduled.

Questions to ask at your next appointment

Whether you are speaking with us or another provider, you can ask: Which parts of this assessment rely on my childhood history? Will you contact family, and what do I need to sign first? How long after my last use will you wait before assigning an ADHD diagnosis? If I am prescribed a stimulant, what monitoring will follow? Ask for answers in writing where you can.

Getting help

If you or someone you love is struggling with alcohol or drugs and may also have ADHD, call Annandale at 855-778-8668 to talk through admission. You can also reach the SAMHSA National Helpline for free, confidential referral information. If you are in crisis or thinking about harming yourself, call or text 988, or call 911 for a medical emergency. For a more detailed conversation about next steps, our team is available at 855-778-8668.

This article is for educational purposes only and is not medical advice, a diagnosis or a substitute for evaluation by a licensed clinician. Treatment outcomes vary by person, and no program can guarantee results.