Clinical Trials in Phelan-McDermid Syndrome

Clinical trials are conducted to test the safety and benefit of a drug for a specific disorder. Clinical trials rely on human volunteers to expand medical knowledge. Some clinical trials are testing newly-developed drugs.  Other clinical trials are testing “repurposed drugs,” or drugs that are approved for another condition and are being tested for benefits in Phelan McDermid syndrome. 

Below are opportunities for treatment intervention in Phelan-McDermid syndrome.

Click each link below to learn more. Always contact the trial coordinator directly to get answers to your questions about a specific trial, or to enroll.

This clincialtrials.gov page is frequently updated on clinical trials for Phelan-McDermid syndrome.

Which Trials are Enrolling?

Phelan McDermid syndrome Ongoing Clinical Trials

*last updated 5/2/24

Controlled Trial of Growth Hormone in Phelan-McDermid Syndrome and Idiopathic Autism

DrugSponsorAges#PatientsLengthLocationsSatus
Growth HormoneIcahn School of Medicine at Mount Sinai2-124512 WeeksUnited States: NYEnrolling by Invitation

Effect of Lithium in Patients With Autism Spectrum Disorder and Phelan-McDermid Syndrome 

DrugSponsorAges#PatientsLengthLocationsSatus
Lithium CarbonateAssistance Publique Hôpitaux de Paris7-82228-30 WeeksFranceRecruiting

Learn about past trials

These studies are currently closed. This means these phases have ended, and may or may not be continuing based on results. Not all completed trials have published results. Click the link of the drug name to read the results if they are available.

*last updated 4/23/24

Open-Label Study of Oral NNZ-2591 in Phelan-McDermid Syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
NNZ-2951Neuren Pharmaceuticals Limited3-122013 WeeksUnited States: IL, MA, TXRecruitment Ended 6/30/23

Piloting Treatment with Intranasal Oxytocin in Phelan-McDermid Syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
Intranasal Oxytocin 2016-2019Alexander Kolevzon5-171812 WeeksUnited States, NYResults Published

AMO-01 to Treat Adolescents and Adults with Phelan-McDermid Syndrome and Co-morbid Epilepsy  

DrugSponsorAges#PatientsLengthLocationsSatus
AMO-01 2018 – 2020Alexander Kolevzon12-4568 WeeksUnited States, NY, TXResults Not Published

Insulin-like growth factor 1 (IGF-1) in Phelan-McDermid Syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
IGF-1 2012-2016Icahn School of Medicine at Mount Sinai5-121928 WeeksUnited States, NYResults Published

Growth Hormone Treatment in Children with Phelan-McDermid syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
Recombinant Human Growth Hormone 2019-2020Swathi Sethuram2-12612 WeeksUnited States, NYResults Published

Effectiveness of Recombinant Human Growth Hormone Therapy for Children with Phelan-McDermid Syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
Recombinant Human Growth Hormone 2020-2021Affiliated Hospital of Jiangnan University1-563 MonthsChinaResults Not Published

Intranasal Insulin on Development and Behavior in Phelan-McDermid Syndrome

DrugSponsorAges#PatientsLengthLocationsSatus
Intranasal Insulin 2013-2015The University Medical Centre Groningen1-182524 MonthsNetherlandsResults Published

Q10 Ubiquinol in ASD and in Phelan-McDermid Syndrome (Q10ASD)

DrugSponsorAges#PatientsLengthLocationsSatus
Coenzyme Q10, Vitamin E, Polyvitamin B 2019-2023University of Messina2-40358 MonthsItalyResults Published

Study to Investigate LP352 in Subjects with Developmental and Epileptic Encephalopathies (PACIFIC)

DrugSponsorAges#PatientsLengthLocationsSatus
LP352, or BexicaserinLongboard Pharmaceuticals12-65528 MonthsUnited States; AustraliaResults Published

Phases of Clinical Trials

Clinical trials are typically conducted in four separate phases.

Phase I

Phase I trials are the first set of studies with human participants, designed to assess the safety and tolerability of a drug. This monitors how a drug interacts with the body and helps to determine the correct dosage.

Phase II

Phase II trials are designed to evaluate drug safety and benefit (efficacy) in people with the disease or condition being studied and determine the potential short-term adverse effects and risks associated with a drug.

Phase III

Phase Ill trials measure drug safety and benefit (efficacy) and monitor for any adverse reactions. These studies are longer in duration and provide most of the safety data needed for regulatory approval.

Phase IV

Phase IV trials are conducted once a drug has been approved by FDA during Post-Market Safety Monitoring and are designed to monitor for any adverse effects over a longer time period.

Why Participate In a Clinical Study?

It is a personal decision on how, when, and why to participate in clinical research. The guide below can help determine which questions you should ask a study coordinator. The perceived benefits and risks of each study will be included in the informed consent document which must be signed before participating in a trial. 

The PMSF can help direct you to the information and resources to help you make your decision. If you have questions, contact us.

Understanding Clinical Trials in
Phelan-McDermid Syndrome

Click on the play icon below to view a 2022 video about clinical trials in Phelan-McDermid syndrome.