When a child is diagnosed with autism, medication is often part of the conversation — but the picture is more complicated than most people expect. Only two drugs have FDA approval specifically for autism, both targeting irritability rather than core symptoms. Most of what gets prescribed addresses co-occurring conditions like anxiety, OCD, or ADHD. Here’s what families and clinicians need to know.
If you’ve ever looked at a medication list for a child with autism spectrum disorder, you know how long it can get. Multiple prescriptions. Complex schedules. Side effects that sometimes require additional drugs to manage. It’s a lot to navigate.
Medication has been part of autism treatment since the disorder became more widely recognized, largely because it emerged during the same era that modern psychiatric drugs were flooding the market. Doctors reached for the tools they had. Many of those tools weren’t designed for autism, and some are still being used today without rigorous clinical trials behind them.
This guide covers the main autism medication categories, what each one is actually prescribed for, and what the research says about their effectiveness.
Why Medication Alone Isn’t Enough
Here’s something that often surprises people: there are currently no FDA-approved drugs that treat the core symptoms of autism. No medication addresses the communication difficulties, social challenges, or repetitive behaviors that define ASD.
What medications target the co-occurring conditions that frequently travel alongside autism — things like anxiety, depression, OCD, aggression, and seizures. Some are used experimentally, with doctors trying drugs designed for other conditions and hoping for a benefit in ASD patients.
The result is that polypharmacy — being on multiple medications at once — is common. A 2013 study found that 64 percent of autistic children surveyed were prescribed at least one psychiatric medication, and 35 percent were on more than one. Researchers believe the rate is even higher in adults.
That complexity matters for caregivers and ABA therapists alike. Both the effects and side effects of these drugs can significantly change a person’s behavior and capacity to engage in treatment.
The FDA-Approved Medications for Autism
Only two psychiatric medications have FDA approval for use in autism spectrum disorder. Both are atypical antipsychotics, and both are approved specifically to reduce irritability and aggression — not to address core ASD symptoms.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Risperidone | Risperdal | Irritability, psychosis, mania | Weight gain, hormone issues |
| Aripiprazole | Abilify | Psychosis, mania, depression, aggression | Nervousness, weight gain, drooling, tremors |
These are the most studied drugs in the ASD context. That doesn’t make them without risk — weight gain and metabolic changes are real concerns with long-term use, especially in children.
Antidepressants (SSRIs and Others)
Antidepressants, particularly SSRIs, are among the most commonly prescribed drugs for people with autism, even though their track record in ASD specifically is mixed.
SSRIs
SSRIs work by increasing serotonin availability in the brain. They’re used to address anxiety, OCD, and depression in ASD patients. The challenge is that their effects vary considerably from person to person, dosing is difficult to calibrate, and discontinuing them can trigger withdrawal-like symptoms that are sometimes worse than the original condition.
In 2004, the FDA issued a black box warning — its strongest category — that SSRIs may increase the risk of suicidal thinking and behavior. A 2013 study specific to ASD found moderate effectiveness in adult patients but no benefit in children.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Fluoxetine | Prozac | Depression, OCD, panic | Allergies, anxiety, seizures |
| Fluvoxamine | Luvox | OCD | Anxiety, constipation, bleeding |
| Sertraline | Zoloft | OCD, PTSD, panic disorder | Drowsiness, nausea |
| Citalopram | Celexa | Depression | Allergies, anxiety, and confusion |
Other Antidepressants
Two other classes of antidepressants appear in ASD treatment less frequently. Tricyclic antidepressants (TCAs) are older and generally considered less effective than SSRIs. Serotonin-norepinephrine reuptake inhibitors (SNRIs) are newer but less tested in the ASD population.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Venlafaxine (SNRI) | Effexor | Depression, anxiety disorders | Blurred vision, constipation, drowsiness |
| Clomipramine (TCA) | Anafranil | OCD | Dizziness, seizures, chest pain, anxiety |
Stimulants for ADHD Symptoms
Stimulants are frequently prescribed when attention and impulse control are significant concerns, especially when the person also has a formal ADHD diagnosis alongside ASD. The two conditions co-occur more often than not.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Methylphenidate | Ritalin | ADHD, narcolepsy | Delirium, irregular heartbeat, psychosis |
| Mixed amphetamine salts | Adderall | ADHD, narcolepsy | Delirium, irregular heartbeat, psychosis |
Anticonvulsants for Seizures
About one-third of people with autism also have epilepsy. For that population, anticonvulsants are among the clearest-cut prescriptions in the ASD toolkit. Their purpose is specific, their effects are well-documented, and the risks are generally manageable.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Valproic acid | Depakote | Seizures, bipolar disorder | Confusion, fever, hair loss |
| Phenytoin | Dilantin | Seizures | Fever, loss of balance |
| Clonazepam | Klonopin | Seizures, panic, anxiety | Paranoia, impaired judgment, and memory |
| Carbamazepine | Tegretol | Seizures, bipolar disorder | Anxiety, depression |
Other Medications Used Off-Label
Clinicians have tried a range of drugs not typically associated with psychiatric care in attempts to address specific autism symptoms, particularly anxiety and repetitive behaviors. These are off-label uses, meaning they haven’t gone through FDA approval for autism specifically.
| Drug | Trade Name | Treats | Side Effects |
|---|---|---|---|
| Naltrexone | Revia | Alcohol dependency (used off-label for repetitive behaviors) | Allergies, constipation |
| Alprazolam | Xanax | Anxiety, panic disorder | Paranoia, impaired memory, judgment, and coordination |
It’s worth noting that the common practice of prescribing a cocktail of multiple medications for ASD hasn’t been put through controlled clinical trials. Many common drug combinations remain largely untested in this population. That doesn’t mean they’re ineffective — it means the evidence base is thinner than most people realize.
Frequently Asked Questions
Are there any FDA-approved medications specifically for autism?
Yes, but only two: risperidone (Risperdal) and aripiprazole (Abilify). Both are atypical antipsychotics approved to treat irritability and aggression in people with autism. No FDA-approved drug currently targets the core symptoms of ASD, the social, communication, and repetitive behavior challenges that define the disorder.
Why are so many different medications prescribed for autism?
Most medications prescribed for autism target co-occurring conditions rather than autism itself. Anxiety, OCD, ADHD, depression, and epilepsy frequently co-occur with ASD, and each may be treated with its own drug. That’s how a single patient can end up on four or five different medications.
Do psychiatric medications affect ABA therapy outcomes?
They can, in both directions. Some medications reduce the agitation or anxiety that makes engagement in therapy difficult. Others have side effects like sedation, impaired memory, or emotional blunting that can interfere with learning and participation. It’s worth discussing medication effects openly with the prescribing doctor and the ABA team.
Is long-term use of psychiatric medications safe for children with autism?
This is an area of genuine concern in the research community. There’s increasing evidence that psychotropic medications taken during formative developmental years can affect brain development, though research is ongoing. Families should have frank conversations with their child’s medical team about risks, benefits, and whether periodic medication reviews are being done.
What should ABA therapists know about their clients’ medications?
A lot, actually. Side effects like fatigue, impaired judgment, weight gain, and mood changes directly influence how a client shows up in a session. ABA practitioners don’t prescribe, but understanding what a client is taking and what the known side effects are helps therapists interpret behavior accurately and communicate effectively with the medical team.
Key Takeaways
- Only two FDA-approved options exist — risperidone and aripiprazole, both of which address irritability, not core ASD symptoms.
- Most prescriptions target co-occurring conditions — anxiety, OCD, ADHD, depression, and epilepsy are the primary targets.
- Polypharmacy is common — a 2013 study found 64% of autistic children on at least one psychiatric medication, with 35% on two or more.
- The evidence base has limits — many drug combinations used in ASD haven’t been validated in controlled clinical trials.
- Medication affects ABA outcomes — therapists benefit from understanding what clients are taking and how side effects may show up in sessions.
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