Treatment for infantile spasms using fenfluramine

A Phase II Study of Fenfluramine for Treatment of Refractory Infantile Spasms

Phase 2 Interventional Children's Hospital of Orange County · NCT04289467

This study is testing if a medication called fenfluramine can help young children with hard-to-treat infantile spasms feel better and have fewer seizures.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment10 (estimated)
Ages12 Months to 36 Months
SexAll
SponsorChildren's Hospital of Orange County Academic / other
Locations2 sites (Los Angeles, California and 1 other locations)
Trial IDNCT04289467 on ClinicalTrials.gov

What this trial studies

This phase II clinical trial aims to evaluate the efficacy, safety, and tolerability of fenfluramine in children aged 12 to 36 months with refractory infantile spasms, a severe form of epilepsy. Participants will undergo baseline video-EEG assessments before receiving fenfluramine treatment for 21 days, followed by repeat video-EEG to assess effectiveness. Those who respond favorably will have the option to continue treatment for up to six months. The study specifically targets children who have not responded to previous treatments with vigabatrin and ACTH.

Who should consider this trial

Good fit: Ideal candidates are children aged 12 to 36 months with a clinical diagnosis of infantile spasms who have not responded to ACTH and vigabatrin.

Not a fit: Patients with significant preexisting cardiovascular disease or those who have recently started other treatments for infantile spasms may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for children suffering from refractory infantile spasms.

How similar studies have performed: While this approach is novel in the context of infantile spasms, similar studies using fenfluramine for other seizure disorders have shown promising results.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Children ages 12 to 36 months, inclusive
* Clinical diagnosis of infantile spasms
* Continued epileptic spasms despite adequate treatment with ACTH and vigabatrin.

Exclusion Criteria:

* Significant preexisting cardiovascular disease
* Exposure to any cannabinoid product within 14 days of screening
* Initiation or dose-titration of any second-line treatment for infantile spasms in the 14 days prior to screening.
* Implantation of a vagal nerve simulator within 14 days of screening
* Initiation and maintenance of the ketogenic diet within 3 months of screening

Where this trial is running

Los Angeles, California and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Infantile Spasm
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.