2026 data ClinicalTrials.gov official source

Conditions: R

Compiled by PlainTrial Editorial, Clinical Trial Intelligence Editorial Team · January 1, 2026

Every condition beginning with R that has a registered US clinical trial, with how many studies cover each.

1,694 conditions starting with "R"

Showing 1,251–1,300 of 1,694

Condition	Trials	Recruiting
Renin-Angiotensin-Aldosterone System	1	1
Renovascular	1	-
Renovascular Hypertension	2	-
Repair of Dura Mater	2	2
Repeatability & Reproducibility	1	-
Repeated IVF Failure	1	-
Reperfusion Injury	5	1
Repetitive Compulsive Behavior	2	2
Repetitive Head Impacts	2	2
Repetitive Negative Thinking	1	1
Repetitive Strain Injury	1	-
Repetitive Stress Injury	1	1
Replacement	4	1
Repository	1	1
Reproducibility of Results	1	1
Reproduction	1	1
Reproductive Behavior	5	2
Reproductive Condition	1	1
Reproductive Disorder	2	2
Reproductive Disorders	1	-
Reproductive Endocrine Conditions in Puberty	1	1
Reproductive Health	11	3
Reproductive Issues	2	1
Reproductive Physiological Processes	1	1
Reproductive Techniques, Assisted	1	1
Rescuer Fatigue During CPR	1	-
Research Awareness	1	-
Research Participation	1	-
Research Subjects	2	1
Resectable Astrocytoma	1	1
Resectable Brain Neoplasm	1	1
Resectable Cholangiocarcinoma	1	-
Resectable Colorectal Carcinoma	4	3
Resectable Cutaneous Squamous Cell Carcinoma of the Head and Neck	1	-
Resectable Dedifferentiated Liposarcoma	2	-
Resectable Digestive System Carcinoma	1	-
Resectable Esophageal Cancer	1	-
Resectable Eyelid Squamous Cell Carcinoma	1	1
Resectable Glioblastoma	2	2
Resectable Head and Neck Squamous Cell Carcinoma	4	4
Resectable Hepatocellular Carcinoma	5	2
Resectable Human Papillomavirus-Independent Head and Neck Mucosal Squamous Cell Carcinoma	1	1
Resectable Intrahepatic Cholangiocarcinoma	1	1
Resectable Liver and Intrahepatic Bile Duct Carcinoma	1	1
Resectable Localized Prostate Cancer	1	1
Resectable Lung Non-Small Cell Carcinoma	2	2
Resectable Non-Small-Cell Lung Cancer	2	1
Resectable Pancreatic Acinar Cell Carcinoma	1	1
Resectable Pancreatic Adenocarcinoma	6	3
Resectable Pancreatic Adenosquamous Carcinoma	1	1

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Data sourced from official public datasets. See our methodology for details.

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