- Cocaine dependence
- Coenzyme Q10 deficiency
- Cognitive function
- Cognitive impairment
- Cold sores
- Colic
- Colistin-induced nephrotoxicity
- Colorectal adenoma
- Colorectal cancer
- Colostomy odor
- Common cold
- Complex regional pain syndrome
- Condylomata acuminata
- Congenital heart disease
- Congestive heart failure (CHF)
- Conjunctivitis
- Connective tissue disease-associated interstitial lung disease (CT-ILD)
- Constipation
- Contact dermatitis
- Contraception
- Contrast induced nephropathy
- Copper deficiency
- Corneal abrasion
- Corneal calcium deposits
- Corneal opacity
- Corneal ulceration
- Corns
- Coronary artery bypass graft (CABG) surgery
- Coronary heart disease (CHD)
- Coronavirus disease 2019 (COVID-19)
- Corticosteroid-induced osteoporosis
- Cough
- Crigler-Najjar syndrome type 2
- Critical illness (trauma)
- Crohn disease
Common Conditions
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