Anaphylactic reactions to gonadotropin-releasing hormone (GnRH) agonists are exceedingly rare, but if they occur, they can be life threatening. This case describes a 33-year-old patient with endometriosis who developed an acute allergic reaction on leuprolide (Lucrin) administration. Although skin tests with the replacement goserelin (Zoladex) were negative, usage of this medication resulted in a similar allergic reaction. This is the first case report that shows that, in case of a proven allergy to one GnRH agonist, a switch to another GnRH agonist should not be made even if allergy tests are negative for this medication.

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http://dx.doi.org/10.1097/MAJ.0b013e31820094daDOI Listing

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