There is not enough evidence that other treatments for croup are helpful. Clinical studies do not show that breathing hot steam or humidified air is helpful and currently it rarely is used. Medical professionals do not want people to use cough medicines, which containdextromethorphan and/or guiafenesin. Clinical studies also do not support inhaling heliox (a mixture of helium and oxygen) to make it easier to breath. Since most cases of croup is are diseases, antibiotics are not used unless bacteria are also suspected. The antibiotics vancomycin and cefotaxime are recommended for bacterial infections. In severe cases associated with influenza A or B, theanti neuraminidase inhibitors can be given.