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am·pho·ter·i·cin B | \ ˌam(p)-fə-ˈter-ə-sən-ˈbē 
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\Definition of amphotericin B
: an antibiotic that is obtained from a soil streptomycete (Streptomyces nodosus) and is administered typically by intravenous injection chiefly to treat serious, potentially life-threatening, systemic fungal infections
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The first known use of amphotericin B was in 1955
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