New hope for toddlers with sickle cell: drug may stop painful attacks
NCT ID NCT06923111
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether a liquid medicine called Xromi (hydroxycarbamide) can safely prevent painful complications of sickle cell disease in children aged 9 months to 2 years. About 180 children will take part, with some receiving Xromi and a comparison group of similar children who did not get the drug. Researchers will track side effects and how well the medicine works over 2 years.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 180 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2025
- Expected to finish
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Jun 2029
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
The study population will consist of children with SCD who meet all the inclusion criteria and none of the exclusion criteria. Identification of participants will be conducted as follows: * Prospective exposure cohort: Potential participants will be identified as they attend the participating sites where eligibility criteria will be assessed prior to initiation with Xromi. * Retrospective comparator cohort: Potential participants will be selected from clinical chart review for hydroxycarbamide naive children that could be matched to prospective participants.
- Ages
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9 to 23 months
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Prospective Exposure Cohort * Inclusion criteria: * Aged from 9 months to under 2 years at the index date. * Diagnosis of SCD. * Known β-globin genotype at the index date. * Prescribed Xromi® for the prevention of complications of SCD. * Parent(s) (or a legal representative(s)) provides written informed consent to participate in the study, unless there is a waiver, non-opposition, or blanket written informed consent by the parent for research studies. * Exclusion criteria: * Previous use of hydroxycarbamide of any formulation before the index date. * Receiving regular blood transfusions (occurring every 8 weeks or more frequently) at the index date. * Known hypersensitivity to any of the excipients of Xromi® at the index date. * Contraindications to the drug at the index date: severe hepatic impairment (Child-Pugh classification C); severe renal impairment (creatinine clearance: CrCl \<30 ml/min); presence of at least one of the following: Absolute neutrophil count (ANC) \< 1.0 x 10\^9/L, absolute reticulocyte count (ARC) \<80 x 10\^9/L, platelets \<80 x 10\^9/L. * Participating in another clinical study of an investigational medicinal product (IMP) at the index date. * Anti-retroviral medicinal products for human immunodeficiency virus (HIV) at the index date. * Active malignancy at the index date. Participants in the prospective exposure cohort who are prescribed Xromi® but do not initiate treatment will be excluded from the dataset. Retrospective Comparator cohort * Inclusion criteria: * Aged from 9 months to under 2 years at the index date. * Diagnosis of SCD. * Known β-globin genotype. * Matched to an exposed participant. * Parent(s) (or a legal representative(s)) provides written informed consent to participate in the study, unless there is a waiver, non-opposition, or blanket written informed consent by the parent for research studies. * Exclusion criteria: * Use of hydroxycarbamide of any formulation before or at the index date. * Receiving regular blood transfusions (occurring every 8 weeks or more frequently) at the index date. * Presence at the index date of any of the following: severe hepatic impairment (Child-Pugh classification C); severe renal impairment (CrCl \<30 ml/min); presence of at least one of the following: ANC \< 1.0 x 10\^9/L, ARC \< 80 x 10\^9/L, platelets \< 80 x 10\^9/L). * Participating in another clinical study of an IMP at the index date. * Anti-retroviral medicinal products for HIV at the index date. * Active malignancy at the index date.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
12 sites in 2 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Basildon University Hospital
RECRUITINGBasildon, United Kingdom
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Evelina London Children's Hospital
RECRUITINGLondon, United Kingdom
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John Radcliffe Hospital
RECRUITINGOxford, United Kingdom
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Kings College Hospital
RECRUITINGLondon, United Kingdom
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Noah's Ark Children's Hospital for Wales
RECRUITINGCardiff, United Kingdom
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North Middlesex University Hospital
RECRUITINGLondon, United Kingdom
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Royal Manchester Children's Hospital
RECRUITINGManchester, United Kingdom
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The Royal London Hospital
RECRUITINGLondon, United Kingdom
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University College London Hospital
RECRUITINGLondon, United Kingdom
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Universitätsklinikum Hamburg-Eppendorf
RECRUITINGHamburg, Germany
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Universitätsklinikum Heidelberg
RECRUITINGHeidelberg, Germany
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Whittington Hospital
RECRUITINGLondon, United Kingdom
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can adding common pain drugs reduce morphine needs in sickle cell crises?
- Gene editing offers hope for a One-Time sickle cell cure
- Tiny biochip could reveal sickle cell severity
- Can a milder transplant cure sickle cell and thalassemia in adults?
- Can an antioxidant supplement calm sickle cell blood cells?
- Can a softer transplant cure sickle cell disease?