Best Anxiolytic for Autism Spectrum Disorder

First-Line Treatment Approach

The American Academy of Child and Adolescent Psychiatry recommends cognitive-behavioral therapy (CBT) as the initial treatment approach for anxiety in individuals with Autism Spectrum Disorder (ASD), especially in children and adolescents 1, 2
For adolescents with ASD, social skills groups and visual schedules can help reduce anxiety in social situations 3

The American College of Cardiology is not relevant here, instead the guideline recommends selective serotonin reuptake inhibitors (SSRIs), particularly sertraline, as the first-line pharmacological treatment option for anxiety in ASD due to their favorable safety profile and evidence of efficacy 4, 2
Sertraline is the recommended SSRI due to its more favorable drug interaction profile compared to other SSRIs 4
Sertraline has a lower risk of discontinuation syndrome compared to paroxetine 4
Sertraline has a relatively favorable side effect profile 4, 2
Starting dosage should be low (25-50mg daily for adults) with gradual titration upward at 1-2 week intervals 4

Citalopram or escitalopram may be considered if sertraline is not tolerated, as they have the least effect on CYP450 isoenzymes and lower propensity for drug interactions 5, 4
Fluoxetine has a longer half-life requiring less frequent dosing adjustments (3-4 week intervals) but may have more drug interactions 1
Paroxetine should be avoided due to higher risk of discontinuation syndrome, greater anticholinergic effects, and increased risk of suicidal thinking 4

Individuals with ASD may be more sensitive to medication side effects, particularly activation/agitation 2
Start with subtherapeutic "test" doses to assess tolerability 1, 2
Monitor closely for behavioral activation/agitation, gastrointestinal symptoms, sleep disturbances, weight changes, and suicidal ideation and behavior, especially in children, adolescents, and young adults 2, 1

For more severe anxiety, combination of CBT and SSRI may be more effective than either treatment alone 1, 6
The Child-Adolescent Anxiety Multimodal Study (CAMS) showed that combination treatment with CBT and sertraline was superior to either treatment alone for anxiety disorders 6

Continue treatment for at least 4-12 months after symptom remission 4
Avoid abrupt discontinuation of SSRIs, particularly shorter-acting ones like sertraline, to prevent discontinuation syndrome 1, 4
Taper medication slowly when discontinuing 1

The American Academy of Child and Adolescent Psychiatry recommends starting with modified Cognitive-Behavioral Therapy (CBT) as the first-line approach for anxiety in children with Autism Spectrum Disorder (ASD) aged 6 and older, with accommodations for autism-specific communication and cognitive differences 7

The American Academy of Child and Adolescent Psychiatry suggests adding an SSRI, specifically sertraline, as the first-line medication for children with ASD when anxiety is severe, causes significant functional impairment, or CBT alone is insufficient after an adequate trial 8