ADHD medication and mood changes: irritability, flatness, mania and psychosis

ADHD medication is meant to change attention, not personality. Still, some adults notice mood changes after starting: a short temper in the late afternoon, more tearfulness, feeling flat, or, rarely, something more serious. Others find their mood steadier than it has been in years. This page explains what FDA labels and published research say about mood effects, which warnings apply to which medications, and when a change needs a call to the prescriber or emergency care. It contains no dosing information.

Irritability and mood swings

Irritability is listed in FDA labels for several ADHD medications. In the two placebo-controlled adult trials summarized in the Concerta (methylphenidate) label, irritability was reported by 6% of people taking Concerta and 1% taking placebo, and depressed mood by 4% against 1%. Less common reactions on the same label include affect lability (rapid shifts in emotion), mood swings, tearfulness, anger and aggression. Amphetamine labels such as Adderall XR list irritability, euphoria, dysphoria (an uneasy, unhappy mood), depression, aggression and anger among reactions reported after approval.

Not every stimulant seems to behave the same way. A 2017 meta-analysis of 32 placebo-controlled trials in children found that methylphenidate products were linked with a slightly lower risk of irritability than placebo, while amphetamine products were linked with a higher risk. The study was in children, and adult data are more limited, but it is one reason a prescriber may consider a different medication if irritability persists. The two families are compared in methylphenidate vs amphetamine.

Medication can also steady mood

Emotional dysregulation, meaning quick anger, excitability and mood swings, is common in adults with ADHD. A 2018 meta-analysis of 21 double-blind trials in adults found small to moderate improvements in emotional dysregulation with methylphenidate, atomoxetine and lisdexamfetamine compared with placebo. The authors suggested the medications may help core ADHD symptoms more than the emotional reactivity itself. So a mood change after starting medication can go in either direction, and tracking it is the only way to know which applies to you.

Feeling flat or "not yourself"

FDA labels do not use the term "emotional blunting", and research on it in adults is limited. If you feel flat, less spontaneous or unlike yourself, that is still worth reporting. The prescriber may want to look at the timing, the dose, whether it fades as the day goes on, and whether depression or poor sleep could explain it. Describe it in your own words. You do not need a medical term for it to count.

Psychosis and mania: the label warnings

Stimulant labels carry a warning about psychiatric adverse reactions. The Adderall XR label, for example, states that:

• stimulants may worsen behavior disturbance and thought disorder in people with a pre-existing psychotic disorder
• stimulants may induce a manic or mixed episode, so prescribers should screen for risk factors first, such as depressive symptoms or a family history of suicide, bipolar disorder or depression
• at recommended doses, stimulants may cause psychotic or manic symptoms, such as hallucinations, delusional thinking or mania, in people with no prior history. In pooled short-term trials, this occurred in about 0.1% of people taking a stimulant, compared with 0% on placebo
• if such symptoms occur, prescribers should consider discontinuing the medication

A 2024 case-control study at McLean Hospital looked at people aged 16 to 35 hospitalized for a first episode of psychosis or mania. Past-month prescription amphetamine use was linked with higher odds of psychosis or mania (adjusted odds ratio 2.68), and the risk rose with higher doses. Past-month methylphenidate use was not linked with higher odds. The authors noted limitations in their design and advised caution with high amphetamine doses and regular screening for these symptoms.

The nonstimulants carry related warnings. The Strattera label tells prescribers to consider discontinuing it if psychotic or manic symptoms occur, and the Qelbree label tells prescribers to screen patients for bipolar disorder. If you have bipolar disorder in your history or your family, tell the prescriber before any ADHD medication is chosen. The NY guide explains the overlap in ADHD or bipolar disorder.

Suicidal thoughts: which labels carry a warning

Both nonstimulant labels ask prescribers to watch closely in the first few months and after dose changes (for Strattera, this warning is written for children and teens), and to tell patients and families to report new or worsening agitation, irritability, insomnia, panic attacks, impulsive behavior or unusual changes in mood. The Strattera label also asks prescribers to monitor for new or worsening aggressive behavior or hostility. See the Strattera and Qelbree pages.

Low mood when the medication wears off or stops

Some mood changes come from stopping rather than taking medication. Stimulant labels list dysphoric mood, depression and fatigue among withdrawal signs after abrupt discontinuation or dose reduction following prolonged use. That pattern is covered in stopping ADHD medication. Depression can also exist alongside ADHD, independent of any medication. See ADHD and depression in adults.

What to track and share

• when the change happens: soon after a dose, as it wears off, or on days you miss it
• whether it started after a new medication, a dose change or a different-looking refill
• sleep, caffeine and alcohol on the same days (see ADHD medication and alcohol)
• what people close to you have noticed
• any personal or family history of depression, bipolar disorder, psychosis or suicide

Do not stop or change the medication on your own because of a mood change unless an emergency clinician tells you to. Contact the prescriber instead, so the next step can be planned safely.

When to call the prescriber, and when to get emergency care

• Call the prescriber soon for irritability, low mood, anxiety, tearfulness or feeling flat that lasts more than a few days or affects work or relationships.
• Call the prescriber the same day for a sustained high or driven mood with little need for sleep, racing thoughts, unusual suspiciousness, or new aggressive feelings.
• Call or text 988 at any hour for thoughts of suicide or self-harm.
• Call 911 or go to an emergency department for hallucinations, beliefs that others find clearly untrue, behavior that puts you or others at risk, or a suicide attempt. New York and New Jersey crisis options are listed in mental health crisis lines.

Dr. Shershow, a psychiatrist licensed in New York and New Jersey who focuses on adult ADHD, screens for mood conditions and other explanations as part of every evaluation and provides ongoing follow-up. Learn about adult ADHD treatment or contact the office.