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General information
Lactose is a disaccharide, galactopyranosyl-glucose, which is found in mammalian milk and, because it is readily compressible, is used as an excipient in many oral drug formulations and dry powder inhalers. It is also added to infant formula milk in order to mimic the composition of human milk. Since lactose is not fermented by brewer's yeast, it is used to sweeten the beer known as milk stout.
Organs and systems
Respiratory
Lactose has occasionally been reported to cause bronchospasm [ ]. However, in a randomized, placebo-controlled study of five doses of inhalation-grade lactose delivered by Diskhaler on lung function and airway conductance in 19 subjects with asthma, lactose had no adverse effect specific airways conductance (sGaw) or FEV 1 [ ].
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