Autism spectrum disorder (ASD) is characterized by persistent deficits in social communication and social interaction, including deficits in social reciprocity, nonverbal communicative behaviors used for social interaction, and skills in developing, maintaining, and understanding relationships.1 In addition, the diagnosis of ASD requires the presence of restricted, repetitive patterns of behavior, interests, or activities.
Initially, ASD was considered a rare condition. In recent years, the reported prevalence has increased substantially. The most recent estimated prevalence is 1 in 68 children at age 8, with a male-to-female ratio of 4 to 1.2
Behavioral interventions are considered to be the most effective treatment for the core symptoms of ASD. Pharmacologic interventions are used primarily to treat associated or comorbid symptoms rather than the core symptoms. Aggression, self-injurious behavior, and irritability are common targets of pharmacotherapy in patients with ASD. Studies have provided support for the use of antipsychotic agents to treat irritability and associated aggressive behaviors in patients with autism,3 but because these agents have significant adverse effects—including extrapyramidal side effects, somnolence, and weight gain—their use requires a careful risk/benefit assessment. Stimulants have also been shown to be effective in treating comorbid attention-deficit/hyperactivity symptoms. The use of selective serotonin reuptake inhibitors (SSRIs) to manage repetitive behaviors and anxiety is also common.
Here, we review 7 recent studies of the pharmacologic management of ASD (Table).4-10 These studies examined the role of SSRIs (sertraline, fluoxetine), an acetylcholinesterase inhibitor (donepezil), atypical antipsychotics (risperidone, aripiprazole, lurasidone), natural supplements (vitamin D, omega-3), a diuretic (bumetanide), and a glutamatergic modulator (riluzole) in the treatment of ASD symptoms.
1. Potter LA, Scholze DA, Biag HMB, et al. A randomized controlled trial of sertraline in young children with autism spectrum disorder. Front Psychiatry. 2019;10:810.
Several studies have shown that SSRIs improve language development in children with Fragile X syndrome, based on the Mullen Scales of Early Learning (MSEL). A previously published trial involving children with Fragile X syndrome and comorbid ASD found that sertraline improved expressive language development. Potter et al4 examined the role of sertraline in children with ASD only.
Study Design
- In this randomized, double-blind, placebo-controlled trial, 58 children age 24 to 72 months with ASD received low-dose sertraline or placebo for 6 months.
- Of the 179 participants who were screened for eligibility, 58 were included in the study. Of these 58 participants, 32 received sertraline and 26 received placebo. The numbers of participants who discontinued from the sertraline and placebo arms were 8 and 5, respectively.
- Among those in the sertraline group, participants age <48 months received 2.5 mg/d, and those age ≥48 months received 5 mg/d.
Outcomes
- No significant differences were found on the primary outcome (MSEL expressive language raw score and age-equivalent combined score) or secondary outcomes (including Clinical Global Impressions–Improvement [CGI-I] scale at 3 months and end of treatment), as per intent-to-treat analyses.
- Sertraline was well tolerated. There was no difference in adverse effects between treatment groups and no serious adverse events.
Conclusion
- Although potentially useful for language development in patients with Fragile X syndrome with comorbid ASD, SSRIs such as sertraline have not proven efficacious for improving expressive language in patients with non-syndromic ASD.
- While 6-month treatment with low-dose sertraline in young children with ASD appears safe, the long-term effects are unknown.
Continue to: Gabis et al5 examined the safety...