Narcan (naloxone): Possible: chest pain, fast or irregular heartbeats; dry cough, feeling short of breath; sweating, severe nausea or vomiting; headache, agitation, anxiety, confusion, ringing /ears; seizure; feeling like you might pass out; or weak pulse, fainting, slow breathing (breathing may stop). http://www.rxlist.com/narcan-side-effects-drug-center.htm.
Answered 3/15/2016
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