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Whether you're a parent weighing options for your child or an adult newly diagnosed, the world of ADHD medications can feel confusing. There are short-acting and long-acting forms, stimulants and non-stimulants, and plenty of strong opinions online. This guide explains the main choices in plain language so you can have a more informed conversation with your prescriber.
Key takeaways
- Stimulants, from the methylphenidate and amphetamine families, are the most commonly used ADHD medications and often work quickly.
- Non-stimulants, such as atomoxetine, viloxazine and extended-release guanfacine or clonidine, are good options when stimulants aren't a fit.
- Prescribers choose based on age, symptoms, health history, daily schedule and other conditions.
- Monitoring appetite, sleep, blood pressure and heart rate is a routine part of care.
- Always talk with your prescriber before starting, stopping or changing any medication.
If you're struggling right now: If you or your child has thoughts of self-harm, call or text 988 to reach the Suicide and Crisis Lifeline. Call 911 in an emergency, or text HOME to 741741. More options are on our crisis resources page.
How ADHD medications work
ADHD affects how the brain manages attention, impulse control and activity level. Many ADHD medications work by increasing the activity of dopamine and norepinephrine, two chemical messengers involved in focus and self-control. Others act on receptors that help regulate those same systems.
Medication doesn't change who you are or "fix" ADHD permanently. When it works well, it can make it easier to focus, follow through, manage impulses and use the strategies that help you succeed. The National Institute of Mental Health has a helpful overview of ADHD and its treatment.
Stimulant ADHD medications
Stimulants are usually the first medication considered for ADHD. They tend to work within hours, so you and your prescriber can often tell fairly quickly whether a medication and dose are helping.
The two main families
- Methylphenidate family: methylphenidate and dexmethylphenidate
- Amphetamine family: mixed amphetamine salts, dextroamphetamine and lisdexamfetamine
Some people respond better to one family than the other. If one doesn't work well or causes side effects, trying the other family is a common next step.
Short-acting vs. long-acting
Short-acting forms work for a few hours and may be taken more than once a day. They can be useful for flexible timing or as a small afternoon boost.
Long-acting forms use special capsules or tablets to release medication gradually, so one morning dose can cover the school or workday. Many people prefer them because they're more convenient and help avoid ups and downs during the day. Some long-acting forms are also harder to misuse.
Non-stimulant ADHD medications
Non-stimulants work differently and usually take longer to reach their full effect, often several weeks. They aren't controlled substances.
- Atomoxetine affects norepinephrine. It's approved for children and adults.
- Viloxazine also works on norepinephrine and is approved for children and adults.
- Extended-release guanfacine and extended-release clonidine act on receptors in the brain that help with attention and impulse control. They're approved for children and teens and may help with hyperactivity, irritability or sleep. They can also be added to a stimulant. Because they lower blood pressure, they shouldn't be stopped suddenly.
Atomoxetine and viloxazine carry an FDA boxed warning about an increased risk of suicidal thoughts in children and teens. Close follow-up, especially early on, is part of safe care.
Comparing stimulants and non-stimulants
| Stimulants | Non-stimulants | |
|---|---|---|
| Examples | Methylphenidate, amphetamine salts, lisdexamfetamine | Atomoxetine, viloxazine, guanfacine ER, clonidine ER |
| How fast they work | Usually within hours | Often several weeks for full effect |
| Controlled substance | Yes | No |
| Common side effects | Lower appetite, trouble sleeping, stomachache, headache, irritability as it wears off | Upset stomach, tiredness, drowsiness, dizziness, depending on the medication |
| Often chosen when | Starting treatment, for most children and adults | Stimulants didn't work or caused side effects, certain health conditions, or misuse concerns |
How prescribers choose
There's no single best ADHD medication. Your prescriber will consider:
- Age. Some medications are approved only for certain age groups.
- Symptoms. Inattention, hyperactivity and emotional ups and downs may respond differently.
- Daily schedule. A long school day, evening homework or a late work shift affects which form makes sense.
- Other conditions. Anxiety, tics, sleep problems, autism or substance use can shape the choice.
- Health history. Heart conditions, high blood pressure and family history matter.
- Past responses. What helped or didn't help you or a close family member is useful information.
Finding the right medication and dose often takes some adjustment. Starting low and increasing gradually is common.
Common side effects
Most side effects are mild and often improve with time or dose adjustments. With stimulants, people may notice a lower appetite, trouble falling asleep, stomachaches, headaches or irritability as the medication wears off. Non-stimulants may cause upset stomach, tiredness or dizziness.
Tell your prescriber about any side effect that bothers you. Changing the timing, dose or medication often helps.
The monitoring you can expect
Regular follow-up is part of safe ADHD treatment. Your prescriber will typically track:
- Appetite and weight, and for children, growth over time
- Sleep, including how long it takes to fall asleep
- Blood pressure and heart rate, since many ADHD medications can raise or lower them
- Mood, including anxiety, irritability or any new changes
- How well the medication is working at school, work and home
Before starting, your prescriber will ask about personal and family heart history.
Refill rules for controlled substances
Stimulants are Schedule II controlled substances under federal law. That means they come with stricter rules than most prescriptions. In general, they can't be refilled the way other medications can, so each fill needs a new prescription from your prescriber. Early fills are usually limited, and lost prescriptions may not be replaced easily.
Prescribers also have to follow federal and state requirements, which may include regular visits and checking the state prescription monitoring program. Rules for prescribing controlled substances by telehealth have also been changing, so our team will explain what applies to you. Planning ahead for refills helps avoid gaps. Pharmacy shortages have also affected some stimulants in recent years, so it can help to call your pharmacy before your supply runs low.
Learn more about ADHD diagnosis
Medication works best after a careful evaluation. Read about child ADHD evaluation and treatment in Chicago or what an adult ADHD diagnosis in Chicago involves. For children and teens, our child and adolescent psychiatry team works with families ages 4 and up.
Frequently asked questions
Will ADHD medication lead to substance misuse later?
This is a very common worry. Research has generally not found that properly prescribed and monitored stimulant treatment raises the risk of later substance use problems, and some studies suggest treating ADHD may lower that risk. Your prescriber can talk through any family or personal history that concerns you.
Can stimulants be misused?
Yes. Stimulants can be misused, especially by people they weren't prescribed for, which is why they carry an FDA boxed warning about misuse and addiction. Store them in a safe, secure place, keep track of how much you have and never share them. Sharing prescription stimulants is illegal and can be dangerous.
What if I have a history of substance use?
You can still get ADHD treatment. A prescriber may recommend a non-stimulant or a long-acting stimulant that's harder to misuse, along with closer follow-up. Our addiction psychiatry team can help coordinate care.
Do I need to take ADHD medication every day?
It depends on the medication and your needs. Non-stimulants usually need to be taken daily to work. Some people on stimulants take breaks on weekends or during summers, but this should be decided with your prescriber.
Get expert ADHD care
ADHD medication works best with careful evaluation and steady follow-up. At Musec Medical, our psychiatrist and psychiatric physician assistants offer evaluation and medication management for children ages 4 and up and adults, in person in Chicago and by telehealth anywhere in Illinois. Request an appointment to get started.
