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 2,101–2,150 of 2,832

Condition	Trials	Recruiting
Antineutrophil Cytoplasmic Antibody-Associated Vasculitis	2	2
Antineutrophilic Cytoplasmic Antibody (ANCA)- Associated Vasculitis (AAV)	1	1
Antioxidant	1	-
Antioxidant Absorption	1	1
Antioxidant Status	1	1
Antioxidants	1	1
Antiphospholipid Antibody Syndrome	2	-
Antiphospholipid Syndrome	7	4
Antiphospholipid Syndrome (APS)	2	1
Antiphospholipid Syndrome in Pregnancy	1	1
Antiplatelet	1	-
Antiplatelet Drugs	1	-
Antiplatelet Therapy	1	-
Antipsychotic Agents	1	-
Antipsychotics	1	1
Antipsychotics and Neuroleptics Toxicity	2	-
Antiretroviral Therapy	1	-
Antiretroviral Treatment	1	1
Antisocial Behavior	2	1
Antisocial Personality Disorder	1	-
Antisynthetase Syndrome	1	-
Antiviral Drug Adverse Reaction	1	-
Antiviral Toxicity	2	1
Anus Neoplasms	3	-
Anxiety	367	148
Anxiety and Depression	1	1
Anxiety and Fear	3	2
Anxiety and Mood Disorders	1	-
Anxiety Depression	10	6
Anxiety Disorder	23	7
Anxiety Disorder Generalized	1	1
Anxiety Disorder Not Otherwise Specified	1	-
Anxiety Disorder of Adolescence	1	1
Anxiety Disorder of Childhood	3	1
Anxiety Disorder of Childhood or Adolescence	1	1
Anxiety Disorders	85	42
ANXIETY DISORDERS (or Anxiety and Phobic Neuroses)	1	1
Anxiety Disorders and Symptoms	10	5
Anxiety Disorders Generalized	1	-
Anxiety Generalized	2	1
Anxiety in Pregnancy	3	3
Anxiety Postoperative	1	1
Anxiety Preoperative	2	1
Anxiety Sensitivity	2	1
Anxiety State	1	-
Anxiety Symptoms	6	2
Anxiety, Separation	3	-
Anxiety, Social	1	-
Anxious Depression	3	2
Any Advanced Solid Tumors	1	-

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