a reaction and distribution system may include a distributor securable near or in a path correspond to a breathing passage such as the nostrils or the mouth of a user for delivering nitric oxide therapy thereto . the distributor may contain an internal reactor for creating the nitric oxide from reactants . alternative embodiments may rely on a line delivering nitric oxide to the distributor from a remote generator such as a canister carried in a pocket or placed / at the bedside of a user .