由于最初症状缓解后可能出现双相反应或复发,所以患者应住院观察 24 小时。[38]Douglas DM, Sukenick E, Andrade WP, et al. Biphasic systemic anaphylaxis: an inpatient and outpatient study. J Allergy Clin Immunol. 1994;93:977-985.http://www.ncbi.nlm.nih.gov/pubmed/8006319?tool=bestpractice.com[39]Stark BJ, Sullivan TJ. Biphasic and protracted anaphylaxis. J Allergy Clin Immunol. 1986;78:76-83.http://www.ncbi.nlm.nih.gov/pubmed/3722636?tool=bestpractice.com[45]National Institute for Health and Care Excellence. Anaphylaxis: assessment and referral after emergency treatment. December 2011. http://www.nice.org.uk/ (last accessed 18 August 2017).http://www.nice.org.uk/guidance/CG134患者应告知其全科医师病情的相关信息,由一名变态反应专科医师进行随访。