Idursulfase is used to treat Hunter’s syndrome, a rare genetic disorder in which the body can’t break down certain body chemicals because of the lack of an enzyme. The medication allows people with Hunter’s syndrome to walk and interact normally.
This medication can cause severe allergic reactions. Allergic reactions usually occur right after the first dose of the medication, but can occur at any time. Patients should stay in the hospital for observation after being given this medication. Symptoms of an allergic reaction include difficulty breathing, swelling of the tongue, face and throat or breaking out in hives or rashes.