Skip to main content
TTrialFinderData
TrialFinderData is for informational purposes only and does not provide medical advice. Always talk to your doctor.

Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 2INTERVENTIONAL

Stopping TSC Onset and Progression 2B: Sirolimus TSC Epilepsy Prevention Study

Stopping TSC Onset and Progression 2B: Sirolimus TSC Epilepsy Prevention Study (NCT05104983) is a Phase 2 interventional studying Tuberous Sclerosis Complex and Epilepsy, sponsored by Darcy Krueger. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

This trial is a Phase II randomized, double-blind, placebo controlled multi-site study to evaluate the safety and efficacy of early sirolimus to prevent or delay seizure onset in TSC infants. This study is supported by research funding from the Office of Orphan Products Division (OOPD) of the US Food and Drug Administration (FDA).

What Stage of Research Is This?

Phase 2 trials evaluate whether a treatment actually works against Tuberous Sclerosis Complex and continue monitoring side effects. Phase 2 enrolls larger groups (typically 100–300 patients) and produces the first real efficacy signal. A successful Phase 2 readout is what unlocks the much larger Phase 3 confirmatory trials needed for FDA approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 64 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Tuberous Sclerosis Complex subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: 1. 0-6 months of age at the time of enrollment (subject must be \<7 months of chronological age at time of randomization and treatment initiation). Corrected age must be at least 39 weeks (calculated by subtracting the number of weeks born before 40 weeks gestation from the chronological age). 2. Has a confirmed diagnosis of TSC based on established clinical or genetic criteria Who Should NOT Join This Trial: 1. Prior history of seizures (clinical or electrographic) at the time of enrollment or identified on baseline EEG. 2. Has been treated in the past or is currently being treated at the time of enrollment with conventional anticonvulsant medications (AEDs), systemic (oral) mTOR inhibitors (such as rapamycin, sirolimus, or everolimus), ketogenic-related special diet, or another anti-seizure therapeutic agent, device, or procedure. 3. Has taken any other investigational drug as part of another research study, within 30 days prior to the baseline screening visit. 4. Has a significant illness or active infection at the time of the baseline screening visit 5. Has a history of significant prematurity, defined as gestational age \<30 weeks at the time of delivery, or other significant medical complications at birth or during the neonatal period that other than TSC would convey additional risk of seizures or neurodevelopmental delay (i.e. HIE, severe neonatal infection, major surgery, prolonged ventilatory or other life-saving supportive care or procedures). 6. Abnormal laboratory values at baseline (i.e., renal function, liver function, or bone marrow production) that are in the opinion of the investigator clinically significant and may jeopardize the safety of the study subject. 7. Prior, planned or anticipated neurosurgery within 3 months of the baseline visit 8. Has a TSC-associated condition for which mTOR treatment is clinically indicated (i.e. SEGA or AML). ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: 1. 0-6 months of age at the time of enrollment (subject must be \<7 months of chronological age at time of randomization and treatment initiation). Corrected age must be at least 39 weeks (calculated by subtracting the number of weeks born before 40 weeks gestation from the chronological age). 2. Has a confirmed diagnosis of TSC based on established clinical or genetic criteria Exclusion Criteria: 1. Prior history of seizures (clinical or electrographic) at the time of enrollment or identified on baseline EEG. 2. Has been treated in the past or is currently being treated at the time of enrollment with conventional anticonvulsant medications (AEDs), systemic (oral) mTOR inhibitors (such as rapamycin, sirolimus, or everolimus), ketogenic-related special diet, or another anti-seizure therapeutic agent, device, or procedure. 3. Has taken any other investigational drug as part of another research study, within 30 days prior to the baseline screening visit. 4. Has a significant illness or active infection at the time of the baseline screening visit 5. Has a history of significant prematurity, defined as gestational age \<30 weeks at the time of delivery, or other significant medical complications at birth or during the neonatal period that other than TSC would convey additional risk of seizures or neurodevelopmental delay (i.e. HIE, severe neonatal infection, major surgery, prolonged ventilatory or other life-saving supportive care or procedures). 6. Abnormal laboratory values at baseline (i.e., renal function, liver function, or bone marrow production) that are in the opinion of the investigator clinically significant and may jeopardize the safety of the study subject. 7. Prior, planned or anticipated neurosurgery within 3 months of the baseline visit 8. Has a TSC-associated condition for which mTOR treatment is clinically indicated (i.e. SEGA or AML). 9. Subjects who are, in the opinion of the investigator, unable to comply with the requirements of the study.

Treatments Being Tested

DRUG

Sirolimus

The investigational drug product to be used in this study is sirolimus, provided in oral suspension.

DRUG

Placebo

Matching placebo

Locations (11)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

University of Alabama at Birmingham
Birmingham, Alabama, United States
University of California at Los Angeles
Los Angeles, California, United States
Stanford University
Palo Alto, California, United States
Children's Hospital Colorado
Aurora, Colorado, United States
Lurie Children's Hospital of Chicago
Chicago, Illinois, United States
Boston Children's Hospital
Boston, Massachusetts, United States
Washington University -- St. Louis
St Louis, Missouri, United States
University of North Carolina at Chapel Hill
Chapel Hill, North Carolina, United States
Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, United States
University of Texas HSC at Houston
Houston, Texas, United States
Seattle Children's Hospital
Seattle, Washington, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT05104983), the sponsor (Darcy Krueger), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT05104983 clinical trial studying?

This trial is a Phase II randomized, double-blind, placebo controlled multi-site study to evaluate the safety and efficacy of early sirolimus to prevent or delay seizure onset in TSC infants. This study is supported by research funding from the Office of Orphan Products Division (OOPD) of the US Food and Drug Administration (FDA). The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT05104983?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT05104983?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT05104983. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT05104983. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.