Paid Clinical Trials in St Louis, MO

As of June 2026, 1,462 paid clinical trials are recruiting in St Louis, Missouri. Compensation typically covers time, travel, and study visits, with stipends ranging from modest amounts for short outpatient studies to several thousand dollars for long or inpatient protocols.

Both patients with specific conditions and healthy volunteers can qualify. Most trials offer free study-related medical care alongside compensation.

Recruiting trial data synced daily from ClinicalTrials.gov. Last sync: June 12, 2026.

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53 clinical trials

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A Study Evaluating the Efficacy of Budesonide, Glycopyrronium and Formoterol Fumarate Metered Dosed Inhaler on Cardiopulmonary Outcomes in Chronic Obstructive Pulmonary Disease

for COPD (Chronic Obstructive Pulmonary Disease)

234 locations incl. Athens

Sponsor: AstraZeneca

Sex: All·Age: 40 - 80

Code: NCT06283966·Phase 3·Recruiting

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A Global Study of Volrustomig (MEDI5752) for Participants With Unresected Locally Advanced Head and Neck Squamous Cell Carcinoma Following Definitive Concurrent Chemoradiotherapy

for Locally Advanced Head and Neck Squamous Cell Carcinoma

70 locations incl. Birmingham

Sponsor: AstraZeneca

Sex: All·Age: 18 - 130

Code: NCT06129864·Phase 3·Recruiting

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AZD0305 as Monotherapy or in Combination With Anticancer Agents in Participants With Multiple Myeloma

for Multiple Myeloma

9 locations incl. Duarte

Sponsor: AstraZeneca

Sex: All·Age: 18+

Code: NCT06106945·Phase 1, Phase 2·Recruiting

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A First-in-human Dose Escalation and Expansion Study to Evaluate the Safety, and Tolerability of AZD8421 Alone or in Combination in Participants With Selected Advanced or Metastatic Solid Tumors

for ER+ HER2- Advanced Breast Cancer

4 locations incl. St Louis

Sponsor: AstraZeneca

Sex: Female·Age: 18+

Code: NCT06188520·Phase 1, Phase 2·Recruiting

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A Phase III Study of Dato-DXd With or Without Durvalumab Compared With Investigator's Choice of Chemotherapy in Combination With Pembrolizumab in Patients With PD-L1 Positive Locally Recurrent Inoperable or Metastatic Triple-negative Breast Cancer

for Breast Cancer

Drug: Durvalumab

64 locations incl. Daphne

Sponsor: AstraZeneca

Sex: All·Age: 18+

Code: NCT06103864·Phase 3·Recruiting

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An Adjuvant Endocrine-based Therapy Study of Camizestrant (AZD9833) in ER+/HER2- Early Breast Cancer (CAMBRIA-2)

for Breast Cancer, Early Breast Cancer

Drug: Camizestrant

148 locations incl. Dothan

Sponsor: AstraZeneca

Sex: All·Age: 18 - 130

Code: NCT05952557·Phase 3·Recruiting

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Effect of Dalcetrapib on CV Risk in a Genetically Defined Population With a Recent ACS

for Acute Coronary Syndrome

178 locations incl. Alexander City

Sponsor: DalCor Pharmaceuticals

Sex: All·Age: 45+

Code: NCT05918861·Phase 3·Recruiting

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Efficacy and Safety of Tozorakimab in Patients Hospitalised for Viral Lung Infection Requiring Supplemental Oxygen

for Viral Lung Infection and Acute Respiratory Failure

68 locations incl. Mobile

Sponsor: AstraZeneca

Sex: All·Age: 18+

Code: NCT05624450·Phase 3·Recruiting

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Efficacy and Safety Study of Ravulizumab IV in Pediatric Participants With NMOSD

for Neuromyelitis Optica Spectrum Disorder

6 locations incl. Washington D.C.

Sponsor: Alexion Pharmaceuticals, Inc.

Sex: All·Age: All ages

Code: NCT05346354·Phase 2, Phase 3·Recruiting

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A Phase I/IIa Study of AZD8205 Given Alone or Combined, in Participants With Advanced/Metastatic Solid Malignancies

for Breast Cancer

14 locations incl. Duarte

Sponsor: AstraZeneca

Sex: All·Age: 18+

Code: NCT05123482·Phase 1, Phase 2·Recruiting

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Capivasertib + CDK4/6i + Fulvestrant for Advanced/Metastatic HR+/HER2- Breast Cancer (CAPItello-292)

for Locally Advanced (Inoperable) or Metastatic Breast Cancer

54 locations incl. Tucson

Sponsor: AstraZeneca

Sex: All·Age: 18 - 99

Code: NCT04862663·Phase 3·Recruiting

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An Open-label Study to Assess Safety and Efficacy of SZC in Paediatric Patients With Hyperkalaemia

for Hyperkalaemia

14 locations incl. Birmingham

Sponsor: AstraZeneca

Sex: All·Age: 0 - 18

Code: NCT03813407·Phase 3·Recruiting

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Registry of Patients With Hypophosphatasia

for Hypophosphatasia (HPP)

20 locations incl. Centennial

Sponsor: Alexion Pharmaceuticals, Inc.

Sex: All·Age: All ages

Code: NCT02306720·Enrolling By Invitation