Traditional remedy to relieve catarrh and head coldssmelling salts may also help to clear the head when feeling faintmackenzies smelling salts contain white granules which have been soaked in ammonia and eucalyptus oil which act as a nasal decongestant directions for use inhale vapour through nostrils as required warnings do not use for children under 3 months of age if symptoms persist see a doctor keep out of the sight and reach of children do not take orally