- 4T scoring system
- A1C
- Abacavir
- Abatacept
- Abciximab
- Abdominal infections
- Abiraterone
- Abscess
- ABVD
- Acarbose[table]
- Accelerated hypertension
- Accelerated idioventricular rhythm (AIVR)
- Accelerated junctional rhythm
- Acebutolol
- Acetaminophen
- Acetaminophen overdose
- Acetazolamide
- Acetest
- Acetylcholine (ACh)
- Acetylsalicylic acid (ASA)
- Achalasia
- Acid-base disturbances
- Acidemia
- Acidosis
- Aclidinium[table]
- Acquired immune deficiency syndrome
- Acquired inhibitors of coagulation factors
- Acromegaly
- Actinomycosis (Actinomyces)
- Activated charcoal (AC)
- Activated partial thromboplastin time (aPTT)
- Activated prothrombin complex concentrate (aPCC)
- Active immunization
- Acute bacterial endocarditis (ABE)
- Acute bronchitis
- Acute cerebrovascular accident
- Acute chest syndrome
- Acute cholecystitis
- Acute coronary syndromes (ACS)
- Acute heart failure
- Acute hemolytic transfusion reactions
- Acute hepatic failure
- Acute hypertensive episodes
- Acute interstitial nephritis (AIN)
- Acute interstitial pneumonia
- Acute intestinal pseudo-obstruction
- Acute kidney injury (AKI)
- Acute lymphoblastic leukemia (ALL)
- Acute myeloid leukemia (AML)
- Acute pancreatitis
- Acute patient care
- Acute pericarditis
- Acute promyelocytic leukemia
- Acute rejection
- Acute renal injury (AKI)
- Acute respiratory distress syndrome (ARDS)
- Acute retroviral syndrome
- Acute spinal cord dysfunction
- Acute tubular necrosis (ATN)
- Acyclovir
- Adalimumab
- Adamantanes
- Addison disease
- Adenomas, pituitary
- Adenosine
- Adrenal crisis
- Adrenal failure/insufficiency
- Adrenal infarction
- Adrenalitis, autoimmune
- Adrenal nodules, incidental
- Adrenergic agonists
- Adrenergic antagonists
- α-Adrenergic antagonists
- β-Adrenergic antagonists
- Adrenocortical carcinoma
- Adrenocorticotropic hormone (ACTH)
- Advair[table]
- Advanced cardiac life support algorithms
- Adverse drug reactions (ADRs)
- Afatinib
- Afrezza
- Agitation
- AIDS
- Airborne precautions
- Airway emergencies
- Airway management
- Airway pressure release ventilation (APRV)
- Alanine aminotransferase (ALT)
- Albendazole
- Albiglutide[table]
- Albumin
- Albuminuria
- Albuterol
- Albuterol/ipratropium[table]
- Alcohol abuse/intoxication
- Alcoholic cirrhosis
- Alcoholic liver disease
- Alcohol septal ablation
- Alcohol toxicity (toxic alcohol)
- Alcohol withdrawal
- Aldosterone
- Aldosterone receptor antagonists
- Alemtuzumab
- Alimentary hypoglycemia
- Aliskiren
- Alkalemia
- Alkaline phosphatase (ALP)
- Alkalosis
- Allergen immunotherapy
- Allergic bronchopulmonary aspergillosis (ABPA)
- Allergy(ies)
- Allergy testing
- Allograft dysfunction, chronic
- Allograft rejection, acute
- Allopurinol
- All-trans-retinoic acid (ATRA)
- Alogliptin[table]
- Alosetron
- Alphanate
- Alprazolam[table]
- Alteplase
- Altered consciousness
- Altered mental status
- Alvimopan
- Alzheimer disease
- Amantadine
- Ambrisentan[table]
- Ambulatory electrocardiography
- Amebiasis
- Amikacin
- Amiloride
- Amino acid solutions
- Aminocaproic acid
- Aminoglycoside(s)
- 5-Aminosalicylates
- Amiodarone
- Amitriptyline
- Amlodipine
- Amoxapine
- Amoxicillin
- Amoxicillin-clavulanate
- Amphetamines
- Amphotericin B
- Ampicillin
- Ampicillin-sulbactam
- Amylase
- Amylin analogs[table]
- Amyl nitrite pearls
- Amyloidosis
- Amyotrophic lateral sclerosis (ALS)
- Anaerobic myonecrosis
- Anagrelide
- Anakinra
- Anal fissures
- Analgesics
- Anaphylaxis
- Anaplasmosis
- Anastrozole
- AndroGel
- Androgen deprivation therapy
- Anemia(s)
- Anemia of chronic disease (ACD)
- Aneurysm
- Angina
- Angioedema
- Angiogenesis inhibitors
- Angiolymphoid hyperplasia, with eosinophilia
- Angiotensin-converting enzyme (ACE) inhibitors
- Angiotensin receptor blockers (ARBs)
- Anidulafungin
- Animal bites
- Anion gap
- Ankylosing spondylitis
- Anorectal bleeding
- Anorectal disorders
- Anorectal manometry
- Anorexia, cancer-related
- Anoro[table]
- Anoscopy
- Antacids
- Anterior cord syndrome
- Anterior pituitary function disorders
- Anthraquinones
- Anthrax
- Antibacterial agents
- Antibiotic(s)
- Antibiotic lock technique
- Antibody deficiencies
- Anticholinergic agents
- Anticholinergic toxidrome
- Anticholinesterase drugs
- Anticoagulants
- Anticonvulsants
- Anticytokine therapies
- Anticytomegalovirus agents
- Antidepressant toxicity
- Anti-D immunoglobulin
- Antidiuretic hormone (ADH)
- Antidotes
- Antidromic AVRT
- Antiemetic agents
- Antiepileptic drugs
- Antifungal agents
- Anti-GBM antibody disease
- Antiherpetic agents
- Antihistamines
- Antihypertensive agents
- Anti-inflammatory therapy
- Anti-interleukin-2 receptor monoclonal antibody
- Anti-ischemic therapy
- Antimicrobial therapy
- Antimycobacterial agents
- Antiphospholipid antibody syndrome (APS)
- Antiplatelet agents
- Antiproliferative agents, for transplant patients
- Antipsychotics
- Antipyretic drugs
- Antiretroviral therapy (ART), for HIV
- Antispasmodic agents
- Antithrombin (AT)
- Antithrombotics
- Antithymocyte globulin
- Anti-tumor necrosis factor-α antagonists
- Antiviral agents
- Anxiety
- Aortic dissection
- Aortic Doppler monitoring
- Aortic regurgitation (AR)
- Aortic sclerosis
- Aortic stenosis (AS)
- Aortic valve repair
- Aortic valve replacement
- Apatite disease
- Apixaban
- Aplastic anemia
- Aplastic crisis
- Apnea
- Apnea-hypopnea index
- Apolipoproteins
- Appendicitis
- Apremilast
- Aprepitant
- Apriso
- Aqueous penicillin G
- Arboviral meningoencephalitis
- Arcapta[table]
- Arformoterol[table]
- Argatroban
- Argon-plasma coagulation
- Aripiprazole
- Aromatase inhibitors (AIs)
- Arrhythmias
- Arsenic trioxide
- Arterial blood gas (ABG) analysis
- Arteriovenous malformation (AVM)[table]
- Arthritis
- Asacol
- Asbestos-induced lung disease
- Ascending cholangitis
- Ascites
- Ascorbic acid[table]
- Aseptic meningitis
- Aspartate aminotransferase (AST)
- Aspergilloma
- Aspergillosis
- Aspirin
- Asplenia, functional
- Assist-control ventilation
- Asthma
- Astrocytoma
- Asymptomatic bacteriuria
- Ataxia-telangiectasia[table]
- Atazanavir
- Atenolol
- ATGAM
- Atheroembolic disease
- Atherosclerosis
- Atherothrombosis
- Atopic dermatitis
- Atopic disease, eosinophilia in
- Atorvastatin
- Atovaquone
- Atovaquone-proguanil
- Atracurium[table]
- Atrial fibrillation (AF)
- Atrial flutter (AFl)
- Atrial septostomy
- Atrioventricular (AV) block
- Atrioventricular (AV) conduction disturbances
- Atrioventricular (AV) nodal blocking techniques
- Atrioventricular (AV) nodal reentrant tachycardia (AVNRT)
- Atrioventricular (AV) node
- Atrioventricular (AV) reentrant tachycardia (AVRT)
- Atripla
- Atropine
- Atropinization
- Atrovent[table]
- Atypical mycobacteria
- Aura
- Autoimmune adrenalitis
- Autoimmune hemolytic anemia
- Autoimmune hepatitis
- Autoimmune-mediated liver disease
- Autoimmune pancreatitis (AIP)
- Auto-PEEP
- Avascular necrosis
- Avian influenza
- Axitinib
- 5-Azacytidine
- Azathioprine
- Azilsartan[table]
- Azithromycin
- Azole antifungals
- Azotemia, prerenal
- Aztreonam
Washington Manual of Medical Therapeutics