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Home › Conditions › Sickle-Cell Anemia

Sickle-Cell Anemia

Part of Anemia

2 published articles · Updated continuously

Clinical Trial Landscape

Clinical Trials for Sickle-Cell Anemia

34 trials tracked for Sickle-Cell Anemia: 7 in phase 3 or 4 and 4 with published results. The most-cited published study has 799 citations.

34Trials tracked
7Phase 3 & 4
0Recruiting
4With published results
Phase distribution
Phase 4 2 Phase 3 5 Phase 2 15 Phase 1 3 Other / NA 9
  1. Phase 3 Hydroxyurea to Prevent Organ Damage in Children With Sickle Cell Anemia Completed · 799 cited
  2. Phase 3 A Phase III Safety and Efficacy Study of L-Glutamine to Treat Sickle Cell Disease or Sickle βo-thalassemia Completed · 557 cited
  3. Phase 3 Novel Use Of Hydroxyurea in an African Region With Malaria Completed · 153 cited
  4. Phase 3 Efficacy and Safety of Rivipansel (GMI-1070) in the Treatment of Vaso-Occlusive Crisis in Hospitalized Subjects With Sickle Cell Disease Completed · 55 cited
  5. Phase 4 Intranasal Fentanyl for Initial Treatment of a Vaso-occlusive Crisis Completed
  6. Phase 4 Actigraphy Improvement With Voxelotor (ActIVe) Study Completed
Show 28 more trials
  1. Phase 3 Silent Cerebral Infarct Transfusion Multi-Center Clinical Trial Completed
  2. Phase 2 Hydroxyurea Management in Kids: Intensive Versus Stable Dosage Strategies Completed
  3. Phase 2 Hydroxyurea and EPO in Sickle Cell Disease Completed
  4. Phase 2 Allogeneic Mixed Chimerism Stem Cell Transplant Using Campath for Hemoglobinopathies & Bone Marrow Failure Syndromes Completed
  5. Phase 2 L-Glutamine Therapy for Sickle Cell Anemia and Sickle ß0 Thalassemia Completed
  6. Phase 2 The Effect of Rivaroxaban in Sickle Cell Disease Completed
  7. Phase 2 Daily Vitamin D for Sickle-cell Respiratory Complications Completed
  8. Phase 2 Management of Severe Acute Malnutrition in SCD, in Northern Nigeria Completed
  9. Phase 2 Study of Efficacy, Safety and Tolerability of ACZ885 (Canakinumab) in Pediatric and Young Adult Patients With Sickle Cell Anemia Completed
  10. Phase 2 Effectiveness of Arginine as a Treatment for Sickle Cell Anemia Completed
  11. Phase 2 A Phase II Trial of Regadenoson in Sickle Cell Anemia Completed
  12. Phase 2 Losartan to Reverse Sickle Nephropathy Completed
  13. Phase 2 Antioxidant Therapy to Reduce Inflammation in Sickle Cell Disease Completed
  14. Phase 2 Prasugrel Versus Placebo in Adult Sickle Cell Disease Completed
  15. Phase 2 Nitric Oxide Inhalation to Treat Sickle Cell Pain Crises Completed
  16. Phase 2 Phase II Randomized Trial:Arginine Butyrate Plus Standard Local Therapy in Patients With Refractory Sickle Cell Ulcers Completed
  17. Phase 1 An Assessment of Prasugrel on Healthy Adults and Sickle Cell Adults Completed
  18. Phase 1 Red Cell Half Life Determination in Patients With and Without Sickle Cell Disease Completed
  19. Phase 1 A Study to Assess the Safety and Pharmacokinetics of HBI-002, an Oral Carbon Monoxide Therapeutic, in Healthy Volunteers Completed
  20. N/A Priapism in Boys and Men With Sickle Cell Disease - Demographics, Characteristics and Prevalence Completed
  21. N/A Evaluation of the AMICUS RBCx System in Sickle Cell Patients Completed
  22. N/A Decision Aid for Therapeutic Options In Sickle Cell Disease Completed
  23. N/A Shared-Decision Making for Hydroxyurea Completed
  24. N/A Microvascular Blood Flow in Sickle Cell Anemia Completed
  25. N/A Pediatric Hydroxyurea Phase III Clinical Trial (BABY HUG) Follow-up Observational Study II Protocol Completed
  26. N/A Long-Term Effects of Hydroxyurea in Children With Sickle Cell Anemia (The BABY HUG Follow-up Study) Completed
  27. N/A Examining Cognitive Function and Brain Abnormalities in Adults With Sickle Cell Disease Completed
  28. N/A Carbon Monoxide Measurement to Screen for Sickle Cell Disease Completed

Showing the 34 most-cited and recently-updated of 34 trials. Browse the full registry →

Trial data sourced from ClinicalTrials.gov. Counts describe the research landscape and are not a treatment recommendation. Informational only — not medical advice.

What the trials found Updated — new results For clinicians

Sickle-Cell Anemia: what the trials found

Hydroxyurea treatment is associated with significant improvements in hemoglobin levels and fetal hemoglobin percentages. Specifically, patients showed a median increase in fetal hemoglobin of 1.70% to 8.00% (p=0.0005) and mean hemoglobin increases ranging from 0.42 to 1.15 g/dL (p=0.033) 12. Additionally, a specific cohort showed a 15% response rate in the percentage of participants with a hemoglobin response 1.

L-glutamine has been shown to significantly reduce the number of sickle cell crises (p=0.0052) and hospitalizations for sickle cell pain (p=0.0045) 5. While another trial observed similar trends in crisis occurrences, hospitalization frequency, and emergency room visits, these specific outcomes did not reach statistical significance 13.

Voxelotor demonstrated a 41.7% success rate for patients achieving a >1 g/dL increase in hemoglobin at week 12, which decreased to 26.1% by week 24 2. Other interventions like Rivipansel did not show statistically significant differences in time to discharge or cumulative IV opioid consumption 7.

Fentanyl Citrate was associated with a significant reduction in pain scores (p=0.048) and a lower incidence of headaches (p=0.05) compared to the control group 3. Transfusion therapy is also established as an intervention for this condition 8.

Recent results — preliminary, needs further review

  • Daily oral vitamin D3 (3,333 IU) was evaluated regarding the ratio of residual lung volume to total lung capacity, though specific significance was not noted in the provided data 9.

For the clinician treating this condition

  • Hydroxyurea is supported by evidence for increasing both hemoglobin and fetal hemoglobin levels 12.
  • L-glutamine may be effective in reducing the frequency of sickle cell crises and associated hospitalizations 5.
  • Voxelotor shows a measurable impact on hemoglobin levels at 12 weeks, though this effect appears to diminish by week 24 2.
  • Fentanyl Citrate is associated with improved pain scores and reduced headache incidence in clinical settings 3.

AI synthesis of 9 cited trials, updated Jun 28, 2026. Informational only — not medical advice; trial data sourced from ClinicalTrials.gov. How we use AI.

HCP Mode — summaries include clinical detail, trial data, and statistical outcomes.
Patient Mode — summaries use plain language, avoiding clinical jargon.
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