The Olbas Inhaler is a handy way to get relief from a blocked nose, any time. This handy little decongestant stick pops in a pocket or purse for instant Olbas congestion relief when it??s needed. The Olbas Inhaler Nasal Stick is a pure plant remedy for the symptomatic relief of blocked sinuses, catarrh, hay fever, colds and flu. It includes the essential oils of cajuput oil 20% w/w, eucalyptus oil 20% w/w, levomenthol 40% w/w, peppermint Oil 20% w/w, all of which have decongestant properties.