ADHD Medication: Types, Side Effects, and More

Attention-deficit hyperactivity disorder (ADHD) is a medical problem that affects the brain. Having ADHD can make it hard to focus, plan, and pay attention. People with ADHD may have more problems controlling their impulses, and they may seem hyperactive (being unusually active).

People with ADHD have actual changes in their brain, particularly in an area called the prefrontal cortex. They can also have changes in some of the signaling molecules in the brain (called neurotransmitters) and their receptors. Specifically, the neurotransmitters norepinephrine
and dopamine might not be present in the right amounts.

If symptoms are significantly impacting a person’s life, a healthcare provider might recommend medications. These medications work to balance the neurotransmitters in the brain and reduce symptoms.

Scientists have developed many different versions of these medications to help treat ADHD. This article will discuss these types in terms of some of their differences and their underlying similarities.

Types of ADHD Medications

Medications used to treat ADHD can be separated into these two broad categories—stimulants and non-stimulants:

  • Stimulants: These are a group of related medications that increase the amount of dopamine and norepinephrine that’s available in the brain. Stimulants can increase a person’s energy, alertness, and attention.

Pros of Stimulants

Stimulants are the oldest and most common type of medication used to treat ADHD. Stimulants work very well to decrease symptoms from ADHD, and they do so very quickly. Usually, they are the first type of medication that a doctor recommends to treat ADHD.

  • Non-stimulants: These are newer types of drugs that have been used to treat ADHD. They tend not to work as quickly as stimulant medications for ADHD, and they may not be as effective for many people.

Pros of Non-Stimulants

Non-stimulants don’t have the same side effects as stimulant medications. They don’t carry the same risk of potential abuse as stimulant medications, which some people find reassuring. And sometimes a non-stimulant medication can help treat both ADHD and another medical issue, like a tic disorder.

For some people, using both a stimulant and a non-stimulant is most effective.

ADHD Stimulants vs. Non-Stimulants

Verywell / Michela Buttignol

Stimulants for ADHD

Stimulants for ADHD fall into two main categories: those derived from the drug amphetamine and those derived from the drug methylphenidate. No evidence has shown that either is superior. These drugs have similar effects on a chemical level.

Over the years, scientists have developed many different formulations of these stimulants to treat ADHD. This often makes a bigger difference than the actual drug used.

Immediate- vs. Extended-Release Drugs

One big difference is how long the different products last. A short-acting immediate-release product might last from four to six hours before wearing off. A long-acting extended-release product might last much longer, like eight to 16 hours.

Many people prefer extended-release formulations of stimulants compared to immediate-release versions. That’s partly because of the convenience of dosing: The extended-release formulations last longer, and they don’t have to be taken as frequently. Extended-release formulations also are less likely to be abused.

Most products are available as pills to be swallowed, but some chewable tablets and liquids are also available. Unless indicated, the following products are available as pills or capsules.

Amphetamine-Based Products

The following are long-acting amphetamine-based stimulants:

  • Adderall XR; Mydayis (amphetamine/dextroamphetamine)
  • Dexedrine (dextroamphetamine)
  • Vyvanse (lisdexamfetamine): Available as a pill or chewable capsule
  • Adzenys (amphetamine): Available as a pill or chewable capsule
  • Dyanavel XR (amphetamine): Available as a liquid

Below are some shorter-acting amphetamine-based stimulants:

  • Evekeo (amphetamine sulfate)
  • Zenzedi (dextroamphetamine sulfate)
  • Adderall (amphetamine/dextroamphetamine)
  • ProCentra (dextroamphetamine sulfate): Available as a liquid

A very closely related drug, Desoxyn (methamphetamine hydrochloride), is another short-acting product. Its active ingredient is methamphetamine, which is sometimes made and sold illegally in the United States. Desoxyn is prescribed less frequently than these other stimulants.

Methylphenidate-Based Products

The following are some long-acting versions:

  • Adhansia XR; Aptensio XR; Concerta; Contempla XR; Jornay PM; Ritalin LA; Metadate (methylphenidate)
  • Azstarys (serdexmethylphenidate/dexmethylphenidate)
  • Focalin XR (dexmethylphenidate)
  • Quillivant XR (methylphenidate): Available as a liquid
  • QuilliChew ER (methylphenidate): Available as a chewable tablet
  • Daytrana (methylphenidate): Available as patches

Below are some shorter-acting methylphenidate products:

  • Focalin (dexmethylphenidate)
  • Ritalin (methylphenidate)
  • Methylphenidate: Available as a chewable tablet
  • Methylin solution: Available as a liquid

Non-Stimulants for ADHD

The following are the four non-stimulant medications that the Food and Drug Administration (FDA) has approved to treat ADHD:

  • Strattera (atomoxetine)
  • Qelbree (viloxazine)
  • Kapvay; Catapres (clonidine ER)
  • Intuniv; Tenex (guanfacine ER)

Atomoxetine is the oldest non-stimulant medication specifically approved for ADHD. Viloxazine is the newest FDA-approved non-stimulant medication for ADHD, but it works in the same way as atomoxetine. Both are serotonin norepinephrine reuptake inhibitors (SNRIs).

Clonidine and guanfacine are also medications that have been used for many years, but for other health conditions, such as high blood pressure. These work in very similar ways, and they carry similar side effects. Both are alpha-2 adrenergic receptor agonists, which also affect norepinephrine.

Antidepressants for ADHD

Some clinicians have also used certain antidepressants to help treat ADHD, even though they haven’t technically been FDA approved. These drugs are also non-stimulants. And even though they have not been studied fully enough to get FDA approval, some studies have shown them helpful for people with ADHD.

Like other types of non-stimulants, they might make sense for people with certain medical conditions. Or they may be an option if other treatments have not worked for you. Sometimes they make sense to use in addition to FDA-approved ADHD treatments.

Some of the most commonly prescribed antidepressants in this context are:

  • Wellbutrin; Wellbutrin XL; Wellbutrin SR (bupropion)
  • Norpramin (desipramine)
  • Aventyl; Pamelor (nortriptyline)
  • Tofranil (imipramine)

ADHD Medications and Side Effects

Side Effects of Stimulants

Stimulant medications for ADHD are very similar in terms of their potential side effects. The risk of side effects increases at higher doses of medication. Some possible side effects include:

  • Mild belly pain
  • Headache
  • Irritability or anxiousness
  • Sleep problems
  • Reduced appetite (and sometimes weight loss or poor weight gain in a child)

Very rarely, stimulant medications trigger depression or even suicidal thoughts.

Side Effects of Non-Stimulants

Strattera (atomoxetine) and Qelbree (viloxazine) are in the same drug class and share some similar potential side effects. Some of these are:

  • Sleepiness
  • Reduced appetite
  • Upset stomach

Catapres and Kapvay (both clonidine) and Tenex and Intuniv (both guanfacine) also share some similar side effects. Some key ones are:

  • Sleepiness
  • Decreased blood pressure causing dizziness
  • Dry mouth
  • Irritability

Some of these symptoms tend to be less severe in Tenex and Intuniv than the others.

Notably, these drugs do not affect the appetite, which may be helpful in people who are underweight.

Are Stimulants Addictive?

Many people worry that stimulants might have an addictive effect. However, when taken as prescribed, the risk of that is low.

These drugs are very similar to illegal street drugs, like methamphetamine, that people use to get high. However, those drugs are taken at much higher amounts than those prescribed by a clinician.

Some people do abuse medications used for ADHD, taking more than prescribed or tampering with the pills to get high. But people who take these drugs the right way don’t have these issues.

Treating ADHD Can Reduce Risk of Substance Use Disorder

Treating ADHD with stimulants might not be totally risk free in terms of addiction. However, untreated ADHD also carries its own addiction risks. And some evidence even shows that treating ADHD may actually reduce a person’s overall risk of substance use.

What Is an ADHD Medication Vacation?

Some people stop taking their ADHD medication for a while, especially stimulant medications. This is called a “medication vacation.” For example, parents might decide to stop giving ADHD medication to their child over summer break.

People do this for different reasons. Maybe a child isn’t gaining enough weight. Or sometimes parents don’t think it is necessary during the summer, when a child doesn’t need to focus as they would in school. Sometimes you just might want to see how a person responds to being off their medication.

Medication vacations can be helpful for some people. However, it’s best to plan them with your healthcare provider. Your doctor might suggest a lowered dosage or switching to a different ADHD medication instead.


Medications used to treat ADHD can be separated into two broad categories: stimulants and non-stimulants. Stimulant medications such as Adderall and Ritalin are well-established treatments for ADHD, and most people find them safe and effective. However, non-stimulant medications, such as Strattera, are another option. As with all medications, ADHD medications have potential side effects. Always consult your doctor about side effects and potential drug interactions.

A Word From Verywell

If you or your child is struggling with ADHD, you may be unsure how to handle it. If you are ready to try medication, the sheer number can be overwhelming.

You may find it reassuring to know that most stimulant medications for ADHD are very similar. You can always switch to a different formulation if you need to.

And if you are worried about stimulant medications, non-stimulants are another option. ADHD coaching and/or psychotherapy (talk therapy) can help many people as well. It’s OK to try different treatments and find what works for you.

Frequently Asked Questions

  • What is the most common medication for ADHD?

    Stimulants are the most common medications prescribed for ADHD. Most of these are derivatives of amphetamine or methylphenidate. Ritalin, a derivative of methylphenidate, is one of the most prescribed medications for ADHD.

  • What are the two major drugs used in ADHD?

    Most drugs prescribed for ADHD are derivatives of amphetamine or methylphenidate. This includes drugs that go by many different names, including Ritalin, Adderall, and Concerta.

  • What is the strongest ADHD medication?

    There isn’t a single medication prescribed for ADHD that is a lot stronger than the others. The main effect is from dosage. If you are prescribed a higher dose of a given drug, you’ll get a stronger effect.

  • What happens if you leave ADHD untreated?

    If you leave ADHD untreated, symptoms will probably not improve. On the other hand, they may not get any worse, and some children do seem to grow out of ADHD. You may be able to use other non-medication coping strategies and therapies.  

  • What is the newest ADHD medication?

    Azstarys, a long-acting stimulant medication, was approved by the FDA in the spring of 2021. Qelbree, a non-stimulant medication for ADHD, was approved about the same time. Both are authorized for ages 6 and older.

  • What is the safest medication for ADHD?

    No single medication is the safest for ADHD. Both stimulant and non-stimulant medications have their risks, and the pros and cons will vary for different people. However, dosage is important. You should use the lowest effective dose to minimize your risks.

  • Are all ADHD medications the same price?

    No. These medications range quite a bit in cost. Newer medications are often more expensive than versions of these drugs that have been around longer, which may be available as generics.

    Longer-acting medications also tend to be more expensive, as may non-tablets (such as liquids and chewable pills). If cost is a concern with your current medication, ask your healthcare provider about your other options.

8 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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Additional Reading

By Ruth Jessen Hickman, MD
Ruth Jessen Hickman, MD, is a freelance medical and health writer and published book author.