2026 data ClinicalTrials.gov official source

Conditions: A

Compiled by PlainTrial · January 1, 2026

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

2,809 conditions starting with "A"

Showing 1,651–1,700 of 2,809

Condition	Trials	Recruiting
Amyotrophic Lateral Sclerosis (Healthy Volunteers)	1	-
Amyotrophic Lateral Sclerosis Associated With a SOD1 Gene Mutation	1	-
Amyotrophic Lateral Sclerosis Type 4	1	1
Anabolic Resistance	1	1
Anaemia	4	-
Anaemia Postoperative	1	-
Anaerobic Power	1	1
Anal Basaloid Carcinoma	3	-
Anal Canal Cancer	1	-
Anal Canal Cloacogenic Carcinoma	3	-
Anal Canal Neuroendocrine Carcinoma	1	-
Anal Canal Squamous Cell Carcinoma	2	-
Anal Canal Undifferentiated Carcinoma	1	-
Anal Cancer	21	9
Anal Cancer, Squamous Cell Carcinoma	1	-
Anal Carcinoma	5	3
Anal Dysplasia	3	1
Anal Erosion	1	-
Anal Fistula	6	4
Anal High-grade Squamous Intraepithelial Lesion	3	2
Anal HPV Infection	1	1
Anal HSIL	1	1
Anal Intraepithelial Neoplasia	1	1
Anal Margin Squamous Cell Carcinoma	3	1
Anal Melanoma	1	1
Anal Non-Keratinizing Squamous Cell Carcinoma	1	1
Anal Precancerous Condition	1	-
Anal Squamous Cell Carcinoma	6	4
Analgesia	20	12
Analgesia, Epidural	1	-
Analgesia, Obstetrical	3	-
Analgesic Drug Dependence	2	-
Analgesic Use	1	1
Analgesics	1	1
Analgesics, Antipyretics and Anti-Inflammatory Drugs Causing Adverse Effects in Therapeutic Use	1	-
Analgesics, Non-Narcotic	2	1
Analgesics, Opioid	4	2
Analgesics, Opioids	1	1
Analysis of Biomarkers in Lymph Node Tissue	1	-
Anaphylaxis	3	2
Anaplastic (Malignant) Meningioma	1	1
Anaplastic Astrocytoma	31	13
Anaplastic Astrocytoma (AOA)	1	-
Anaplastic Astrocytoma of Brain	2	1
Anaplastic Astrocytoma or Gliosarcoma	1	-
Anaplastic Astrocytoma, IDH-Wildtype	2	1
Anaplastic Astrocytoma, Not Otherwise Specified	1	-
Anaplastic Astrocytomas	1	-
Anaplastic Ependymoma	6	2
Anaplastic Ganglioglioma	1	-

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