Sinarest vapocap inhalant capsule contains anti-inflammatory agents that help to provide immediate relief from symptoms of sinusitis, pharyngitis, common cold, and other respiratory conditions. It is a decongestant that thins mucus, clears blocked nose, and relieves local irritation that occurs due to cold. Also, it is used in the treatment of cough, common cold, and asthma. It works by decreasing histamine H1 levels, a substance responsible for causing bronchoconstriction. Thus, it relieves nasal congestion by thinning mucus and making it easier to cough out. Menthol and eucalyptus provide a cooling sensation.