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 1,151–1,200 of 1,694

Condition	Trials	Recruiting
Relative Afferent Pupil Defect (RAPD)	1	-
Relative Bioavailability	1	-
Relative Energy Deficiency in Sport	1	1
Relatives	1	1
RELAX Telehealth Intervention	1	1
Relaxation	2	1
Relaxation and Mindfulness Training	1	1
Relaxation Therapy	1	-
Religious or Spiritual Problem	1	-
REM Behavior Disorder	2	-
REM Sleep Behavior Disorder	12	6
REM Sleep Behavior Disorder (iRBD)	1	-
REM Sleep Measurement	1	-
REM Sleep Parasomnias	1	1
Remdesivir	1	1
Remimazolam	1	1
Reminiscence Therapy	1	1
Remission	4	2
Remitted Major Depressive Disorder	1	-
Remote Consultation	1	-
Remote Consultation, Teleconsultation	1	-
Remote Consultation, Video	1	-
Remote Maintenance Training Program	1	-
Remote Monitoring	2	1
Remote Patient Monitoring	3	3
Remote Transfer Training Program	1	-
Remote Visits	1	1
Remote vs. In-Person	1	1
Renal Agenesis and Dysgenesis	1	1
Renal AL Amyloidosis	1	1
Renal Allograft Recipients	1	1
Renal Anemia	3	-
Renal Angiomyolipoma	1	-
Renal Benign Neoplasm	1	1
Renal Calculi	5	2
Renal Cancer	30	15
Renal Cancers	1	-
Renal Carcinoma	4	4
Renal Cell	1	-
Renal Cell Cancer	11	3
Renal Cell Cancer Metastatic	2	1
Renal Cell Cancer, Recurrent	1	-
Renal Cell Carcinoma	122	50
Renal Cell Carcinoma (Kidney Cancer)	3	2
Renal Cell Carcinoma (RCC)	12	6
Renal Cell Carcinoma 4	1	-
Renal Cell Carcinoma Associated With Xp11.2 Translocations/TFE3 Gene Fusions	1	-
Renal Cell Carcinoma of Papillary Histology	1	-
Renal Cell Carcinoma Recurrent	1	-
Renal Cell Carcinoma With Clear Cell Histology	1	-

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