- Abatacept, for rheumatoid arthritis
- ABCDE Rule of Assessment for Melanoma
- ABCDEs of trauma care
- Abdomen
- Abdominal aortic aneurysm
- Abdominal Trauma
- Abdominocentesis, for peritonitis
- Abiraterone, for prostate cancer
- Abortion, spontaneous
- Abortion, Spontaneous
- Abruptio placentae
- Abscess, anorectal
- Absorptiometry, x-ray, dual energy
- Acebutolol, for myocardial contusion
- Acetaminophen (Tylenol)
- Acetazolamide (Diamox)
- Acetylcholine receptor antibody test, in myasthenia gravis
- Acid-ash diet, for urinary tract infection
- Acid-base imbalances
- Acid-Base Imbalances: Metabolic Acidosis and Alkalosis; Respiratory Acidosis and Alkalosis
- Acid-fast bacilli sputum, in tuberculosis
- Acidosis
- Acromegaly
- ACTH stimulation test, in adrenal insufficiency
- Activated partial thromboplastin time (APTT)
- Activated protein C (APC), for disseminated intravascular coagulation
- Acute/adult respiratory distress syndrome (ARDS)
- Acute Adrenal Crisis
- Acute Alcohol Intoxication
- Acute coronary syndromes (ACSs)
- Acute idiopathic demyelinating polyneuropathy
- Acute kidney injury (AKI)
- Acute motor axonal neuropathy (AMAN)
- Acute otitis media (AOM)
- Acute Respiratory Distress Syndrome
- Acyclovir (Zovirax)
- Adalimumab
- Addison anemia
- Addison disease
- Adefovir dipivoxil (Hepsera), for hepatitis
- Adenectomy, transsphenoidal, for Cushing syndrome
- Adenocarcinoma
- Adenoidectomy and tonsillectomy, for chronic tonsillitis
- Adenosine
- Adhesive films, for pressure injury
- Adrenal crisis, acute
- Adrenalectomy
- Adrenal Insufficiency (Addison Disease)
- Adrenergic agents, centrally acting, for hypertension
- Adrenocorticotropic hormone (ACTH)
- Adriamycin (doxorubicin)
- Adriamycin (doxorubicin), for bladder cancer
- Adult/acute respiratory distress syndrome (ARDS)
- Air embolism
- Airway, impaired
- Akinesia, in Parkinson disease
- Alanine aminotransferase (ALT)
- Albumin
- Albuterol, for emphysema
- Albuterol aerosol, for bronchiolitis
- Albuterol sulfate, for asthma
- Alcohol use
- Alcohol Withdrawal
- Aldosterone
- Alemtuzumab
- Alendronate (Fosamax)
- Alginates, for pressure injury
- Alkaline phosphatase
- Alkaline reflux gastritis
- Alkalosis
- Alkylating agents
- Allergic purpura
- Allergic reaction
- Allergy testing
- Almotriptan, for migraine headache
- Alosetron, for irritable bowel syndrome
- Alpha-1 antitrypsin (AAT) level, in emphysema
- Alpha-adrenergic blockers
- Alpha-adrenergic drugs, for neurogenic bladder
- Alpha- and beta-adrenergic agonists, for hypertension
- Alpha-fetoprotein, in ovarian cancer
- Alpha-glucosidase inhibitors, for diabetes mellitus
- 5-alpha reductase inhibitor, for benign prostatic hyperplasia
- ALS (amyotrophic lateral sclerosis)
- ALS Functional Rating Scale
- Alteplase (t-PA, Activase)
- AlternaGEL, for esophageal diverticula
- Altretamine, for ovarian cancer
- Aluminum carbonate (Basaljel)
- Aluminum hydroxide (Amphojel)
- Aluminum salts, for gastroesophageal reflux disease
- Alzheimer disease
- Amantadine, for influenza
- Amantadine hydrochloride (Symmetrel)
- Ambrisentan (Letairis), for pulmonary hypertension
- Aminoglycosides
- Amiodarone
- Amlodipine, for hypertension
- Ammonium chloride, for hypochloremia
- Amniocentesis, in chorioamnionitis
- Amoxicillin
- Amoxicillin-clavulanate, for diverticular disease
- Amoxicillin-clavulanate potassium, for pyelonephritis
- Amphojel, for esophageal diverticula
- Amphotericin B, for candidiasis
- Ampicillin
- Ampicillin/clavulanate, for urinary tract infection
- Amputation
- Amrinone, for myocardial contusion
- Amylase
- Amyloidosis
- Amyotrophic Lateral Sclerosis
- Amyotrophic lateral sclerosis (ALS)
- Anakinra, for rheumatoid arthritis
- Analgesia
- Anaphylaxis
- Anemia
- Anesthesia
- Aneurysm(s)
- Angina pectoris
- Angiography
- Angioplasty, balloon catheter
- Angiotensin-converting enzyme (ACE) inhibitors
- Angiotensin II receptor antagonist
- Anidulafungin, for candidiasis
- Ankle arm index, in amputation
- Ankle-brachial index
- Anorectal abscess
- Anorectal fistula
- Anorexia nervosa
- Anoscopy
- Antacids
- Anteromedial temporal resection (AMTR), for epilepsy
- Anthracycline (idarubicin, daunorubicin) and cytarabine (araC), for acute leukemia
- Anti-acetylcholine receptor antibody, in myasthenia gravis
- Antiandrogens, for prostate cancer
- Antianginal agents
- Anti-anxiety agents, for alcohol withdrawal
- Antiarrhythmic, for junctional dysrhythmias
- Antibacterials
- Antibiotics
- Antibody staining, in legionnaires disease
- Anticholinergics
- Anticholinesterase drugs, for myasthenia gravis
- Anticoagulants
- Anticonvulsants
- Anti-cyclic citrullinated peptide antibodies, in rheumatoid arthritis
- Antidepressants
- Antidiabetics, for diabetes mellitus
- Antidiarrheal agents
- Antidiuretic hormone (ADH)
- Antidiuretics, for gastritis
- Antidysrhythmics
- Antiemetic, for migraine headache
- Antiestrogens, for breast cancer
- Antifungal agents
- Antigen testing
- Antihistamines, for anaphylaxis
- Antihypertensives
- Anti-infectives
- Anti-inflammatory(ies)
- Antilipemic agents, for coronary heart disease
- Antimalarial, for lupus erythematosus
- Antimetabolites
- Antimicrobials
- Antimuscarinic drugs, for neurogenic bladder
- Antineoplastic agents
- Antinuclear antibody
- Antiparkinson agents
- Antiplatelet agents
- Antiproliferative drugs, for human papillomavirus
- Antiprotozoals, for toxoplasmosis
- Antipsychotics
- Antipyretics
- Antiretroviral therapy, for HIV
- Antiseptic, urinary
- Antispasmodic agents
- Antistreptolysin O (ASO) titer, in rheumatic fever
- Antithrombin III, in disseminated intravascular coagulation
- Antitissue transglutaminase antibody, in celiac disease
- Anti-TNF agents, for Crohn disease
- Antitubercular agents
- Antitussives, for pneumocystis pneumonia
- Antiviral agents
- Anusol suppositories, for hemorrhoids
- Aortic aneurysm
- Aortic angiography, in aortic valve insufficiency
- Aortic valve insufficiency
- Aortic valve stenosis
- Apheresis, for chronic leukemia
- Aplastic anemia
- Apomophine, for Parkinson disease
- Apparent life-threatening events, SIDS and
- Appendectomy
- Appendicitis
- Aqueous crystalline penicillin G, for syphilis
- Arboviruses
- ARDS (acute respiratory distress syndrome)
- Aripiprazole, for Alzheimer disease
- Arrhythmia, sinus
- Arterial air embolism
- Arterial blood gases (ABGs)
- Arterial occlusive disease
- Arterial pressure monitoring, in arterial occlusive disease
- Arteriography, ultrasound, in arterial occlusive disease
- Arteriosclerosis
- Arteriosclerosis obliterans
- Arthritis
- Arthrodesis, for osteoarthritis
- Arthrogram, in tendinitis
- Arthroplasty
- Asacol, for Crohn disease
- Aschoff bodies, in rheumatic fever
- ASO titer, in rheumatic fever
- Asparaginase, for acute leukemia
- Aspartate transaminase (AST)
- Aspiration, fine-needle, in fibrocystic breast condition
- Aspirin
- Asthma
- Atelectasis
- Atenolol
- Atherosclerosis
- Atorvastatin, for hyperlipoproteinemia
- Atracurium (Tracrium)
- Atrial dysrhythmias
- Atrial Dysrhythmias
- Atrial fibrillation
- Atrial flutter
- Atropine
- Atropine sulfate
- Atypical antipsychotics, for Alzheimer disease
- Autonomic dysreflexia
- Autonomic reflexia
- Autosomal dominant polycystic kidney disease (ADPKD)
- Axonal injury, diffuse
- Azathioprine (Imuran)
- Azithromycin (Zithromax)
- Azoles, topical, for candidiasis
- Aztreonam, for bacterial pneumonia
Diseases and Disorders