- Cafe au lait spots
- Caffeine, in breast-feeding women
- CAGE screening test
- Calabar swellings
- Calan SR
- Calcium
- Calcium channel blockers
- Calculi
- Calendar method
- Calf pain
- Callosities
- Calluses
- Calymmatobacterium granulomatis
- Campath-1H
- Camphor/menthol
- Camphor poisoning
- Campylobacter (campylobacteriosis)
- Campylobacter jejuni
- Cancer
- Cancer of unknown primary
- Cancer screening
- Candesartan cilexitil
- Candesartan cilexitil/HCTZ
- Candida albicans (candidiasis)
- Canker sore
- Cantharellus poisoning
- Capecitabine
- Capoten
- Captopril
- Carbamazepine
- Carbonic anhydrase inhibitors, topical ophthalmic
- Carbon monoxide poisoning
- Carboplatin
- Carbuncles
- Carcinoid (tumor)
- Carcinoid syndrome
- Carcinoma
- Carcinoma in situ, cervical
- Carcinomatous meningitis
- Cardene
- Cardene SR
- Cardiac lesions, bacterial endocarditis prophylaxis and
- Cardiac regurgitation
- Cardiac tamponade
- Cardiac tumors
- Cardiogenic syncope
- Cardiomyopathy
- Cardizem CD
- Cardizem SR
- Cardura
- Carmol
- Carmustine (BCNU)
- Carotid artery aneurysm
- Carotid body tumor
- Carotid circulation obstruction
- Carotid dissection
- Carotid pulse, bisferiens
- Carotid stenosis
- Carotid upstroke, delayed
- Carpal tunnel syndrome
- Carteolol
- Carteolol HCl 1% solution
- Cartia XT
- Cartrol
- Carvedilol
- Cataflam
- Catapres
- Catapres TTS
- Cataract
- Catatonia or stiffness
- Cat bites
- Caterpillar bites
- Cat scratch disease
- Caustics
- Cavernous hemangioma, of liver
- CCNU (lomustine)
- CdA
- Celebrex
- Celecoxib
- Celexa
- Celiac artery aneurysms
- Celiac axis compression syndrome
- Celiac disease (sprue)
- Cellular immune deficiency
- Cellulitis
- Central nervous system (CNS)
- Central vestibulopathy
- Centruroides sting
- Cerebellar degeneration
- Cerebellar hemangioblastoma
- Cerebellar hemorrhage
- Cerebral artery occlusion
- Cerebral contusion, acute sequelae of
- Cerebral hemorrhage
- Cerebral laceration, acute sequelae of
- Cerebral lymphoma, primary
- Cerebral vein thrombosis
- Cerebrospinal fluid, in CNS disease
- Cerebrovascular disease, occlusive
- Cerumen impaction
- Cervical (cervix) lesions
- Cervical cancer
- Cervical cap
- Cervical discharge
- Cervical disk protrusion, acute
- Cervical intraepithelial neoplasia
- Cervical lymphadenopathy
- Cervical musculotendinous strain
- Cervical polyps
- Cervical rib syndrome
- Cervical spondylosis
- Cervical vertigo
- Cervicitis
- Chagas' disease
- Chalazion
- Chancroid
- Charcot's joint
- Charcot's triad
- Chemodectomas
- Chemotherapy, cancer
- Chest infection, anaerobic
- Chest pain
- Chest pain, pleuritic
- Cheyne-Stokes respiration
- CHF (congestive heart failure)
- Chickenpox (varicella)
- Chigger bites
- Child-Pugh classification, for cirrhosis, modified
- Chinese liver fluke
- Chlamydia
- Chlamydia pneumoniae
- Chlamydia pneumoniae pneumonia
- Chlamydia psittaci
- Chlamydia trachomatis
- Chloral hydrate
- Chlorambucil
- Chloramphenicol, in breast-feeding women
- Chloramphenicol 0.5% solution
- Chloramphenicol 1% ointment
- Chlordiazepoxide
- Chlorinated insecticide poisoning
- Chlorpromazine
- Chlorpropamide
- Chlorthalidone
- Cholangiocarcinoma
- Cholangitis
- Cholecalciferol
- Cholecystectomy, Pre- & Post- Syndrome
- Cholecystitis
- Choledocholithiasis
- Cholelithiasis (gallstones)
- Cholera
- Cholestasis
- Cholestatic jaundice
- Cholestatic syndromes, hereditary, biliary
- Cholesterol
- Cholesterol decreased
- Cholestyramine
- Choline magnesium salicylate
- Cholinergic poisoning
- Choline salicylate
- Chondrocalcinosis
- Chorea
- Choriocarcinoma
- Choriocarcinoma, treatment of
- Choriomeningitis, lymphocytic
- Chromoblastomycosis
- Chronic disease, anemia of
- Chronic fatigue syndrome
- Chronic inflammatory polyneuropathy (CIDP)
- Chronic lymphocytic leukemia (CLL)
- Chronic lymphocytic thyroiditis
- Chronic myelocytic/myelogenous leukemia (CML)
- Chronic myelogenous leukemia
- Chronic myelomonocytic leukemia (CMML)
- Chronic obstructive pulmonary disease (COPD)
- Chronic open-angle glaucoma
- Churg-Strauss syndrome
- Ciclopirox
- CIDP (chronic inflammatory polyneuropathy)
- Ciguatera poisoning
- Ciprofloxacin HCl, as ophthalmic agent
- Circumscribed neurodermatitis
- Cirrhosis
- Cisplatin
- Citalopram
- Citrobacter, nosocomial infections from
- CJD (Creutzfeldt-Jakob disease)
- Cladribine (CdA)
- Clarithromycin
- Claudication
- Clindamycin/benzoyl peroxide
- Clindamycin phosphate
- Clinoril
- Clitocybe poisoning
- CLL
- Clobetasol propionate
- Clomipramine
- Clonazepam
- Clonidine
- Clonorchiasis
- Clonorchis sinensis
- Clorazepate
- Clostridial myonecrosis
- Clostridium
- Clostridium botulinum
- Clostridium difficile
- Clostridium perfringens, acute diarrhea from
- Clostridium tetani
- Clotrimazol
- Clozapine
- Clozaril
- Clubbed digits
- Cluster headache
- CML
- CMV infection
- CNS angiitis
- CNS infection
- CNS vasculitis, primary
- Coagulase-negative Staphylococcus
- Coagulopathy
- Coal worker's pneumoconiosis
- Coarctation of aorta
- Cocaine overdose
- Cocci, gram-negative and -positive, drugs for
- Coccidioides immitis
- Coccidioidomycosis
- Coccidiosis
- Codeine
- Cognitive disorders
- Cold agglutinin disease
- Cold sore
- Cold urticaria
- Colestid
- Colestipol
- Colitis
- Collagen-vascular disorders
- Colon cancer
- Colonic pseudo-obstruction, acute
- Colon polyps
- Colorectal cancer
- Coma
- Common peroneal nerve palsy
- Common variable immunodeficiency
- Community-acquired pneumonia
- Complete block
- Complex 15
- Complex regional pain syndrome
- Concussion, acute sequelae of
- Condom
- Conductive hearing loss
- Condyloma acuminata
- Congenital adrenal hyperplasia
- Congenital nevi
- Congestive heart failure
- Congestive heart failure, right-sided
- Conjunctivitis
- Connective tissue disease(s)
- Constipation
- Constricted pupil
- Contact dermatitis
- Contraception
- Contraceptives, oral
- Contractures, Dupuytren's
- Contusion, cerebral, acute sequelae of
- Conversion disorder
- COPD (chronic obstructive pulmonary disease)
- Coprinus poisoning
- Coral snake bite
- Cordran
- Coreg
- Corgard
- Corlopam
- Corneal infection
- Corneal trauma
- Cornebacterium diphtheriae
- Corns
- Corns & calluses of feet and toes
- Cor pulmonale
- Corpus luteum cysts
- Corticosteroids
- Cortinarius orellanus poisoning
- Cortisol, excess of
- Corynebacterium diphtheriae
- Corynebacterium jeikeium, drugs for
- Cough
- Covera-HS
- COX-2 inhibitors
- Coxiella burnetii
- Coxsackievirus infections
- Cozaar
- CPPD (pseudogout)
- Cramps
- Cranial nerve 3 palsy
- Cranial nerve 6 palsy
- Cranial nerve palsy
- Craniopharyngioma
- Crank
- CREST syndrome, autoantibodies and
- Creutzfeldt-Jakob disease (CJD)
- Crixivan
- Crohn's disease
- Crolom
- Cromolyn
- Cromolyn-nedocromil sodium
- Cromolyn sodium 4% solution
- Cryoglobulin-associated glomerulonephritis
- Cryoglobulinemic vasculitis
- Cryptococcal meningitis
- Cryptococcosis
- Cryptococcus neoformans
- Cryptogenic fibrosing alveolitis
- Cryptosporidium (cryptosporidiosis)
- Cryptosporidium parvum
- Crystal meth
- Cunninghamella, mucormycosis from
- Cupulolithiasis
- Cushing's disease
- Cushing's syndrome
- Cutaneous disease
- Cutaneous larva migrans
- Cutaneous leishmaniasis
- Cutaneous T cell lymphoma
- Cyanide poisoning
- Cyanosis
- Cyclocort
- Cyclophosphamide
- Cyclospora (cyclosporiasis)
- Cyclosporine, in breast-feeding women
- Cyclothymia
- Cyproheptadine
- Cyst
- Cystadenocarcinoma
- Cystadenoma
- Cysticercosis
- Cysticercus bovis
- Cystic fibrosis
- Cystic hydatid disease
- Cystic lesions, nodular
- Cystine calculi
- Cystitis, acute
- Cystitis, interstitial
- Cystocele
- Cytarabine
- Cytomegalovirus (CMV)