Olbas Oil Inhalant Decongestant is a combination of various natural oils that provide a treatment that works to relieve symptoms for several conditions, these include: Cold, Catarrh, Nasal congestion, Hayfever and allergies. Olbas is suitable to be used on tissues and handkerchiefs by children aged 3 months and older, as a hot water additive by children aged 2 and over, and on the skin to help muscle pain by children aged 12 and over. Anyone who is allergic to the ingredients contained in the oil should not use it. If you are using any other medication for nasal congestion or muscle pains, speak to a doctor before using.