2026 data ClinicalTrials.gov official source

Conditions: A

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

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

2,832 conditions starting with "A"

Showing 2,051–2,100 of 2,832

Condition	Trials	Recruiting
Anti-Neutrophil Cytoplasm Antibodies (ANCA) Associated Vasculitis	1	-
Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis	4	-
Anti-obesity Agents	1	1
Anti-Social Behavior	1	-
Anti-Synthetase Syndrome	2	2
Antibacterial Agents	1	-
Antibiotic	1	1
Antibiotic Allergy	3	1
Antibiotic Duration	1	-
Antibiotic Enterocolitis	1	-
Antibiotic Prophylaxis	1	1
Antibiotic Resistant Infection	5	2
Antibiotic Resistant Strain	1	-
Antibiotic Side Effect	3	1
Antibiotic Stewardship	3	2
Antibiotic Treatment	1	1
Antibiotic Use	2	1
Antibiotic-Associated Colitis	2	-
Antibiotic-associated Diarrhea	1	-
Antibiotics	2	2
Antibiotics Causing Adverse Effects in Therapeutic Use	1	-
Antibodies	1	-
Antibody Deficiency	1	1
Antibody Mediated Rejection of Lung Transplant	1	1
Antibody Titers	1	-
Antibody-mediated Rejection	6	4
Anticancer Treatment	1	-
Anticholinergic Adverse Reaction	1	-
Anticholinergic Toxicity	1	1
Anticipated Difficult Airway	1	-
Anticipatory Guidance	1	1
Anticoagulant-Induced Bleeding	2	-
Anticoagulants	3	2
Anticoagulants and Bleeding Disorders	1	-
Anticoagulants; Increased	3	1
Anticoagulation	2	-
Anticoagulation With Apixaban	1	-
Antidepressant Induced Excessive Sweating	1	-
Antidepressant Induced Sexual Dysfunction	1	-
Antimetabolites, Antineoplastic	1	-
Antimicrobial	1	-
Antimicrobial - Induced Nephropathy	1	1
Antimicrobial Drug Resistance	2	1
Antimicrobial Prescribing Practices	1	-
Antimicrobial Resistance	2	-
Antimicrobial Stewardship	3	1
Antineoplastic Agents	2	1
Antineoplastic Agents, Hormonal	1	-
Antineoplastic Agents, Immunological	1	1
Antineoplastics Toxicity	1	1

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