In case of accidental poisoning with xylometazoline while taking it inside, there may be mydriasis, nausea, vomiting, cyanosis, fever, spasms, tachycardia, cardiac arrhythmia, collapse, cardiac arrest, hypertension, pulmonary edema, respiratory disorders, mental disorders, suppression of the central nervous system, accompanied by drowsiness, lower body temperature, bradycardia, hypotension, apnea, coma.