Picture of Serum Sickness
Serum sickness occurs when the immune system has a delayed response to medications or antiserums. Penicillin is the most common cause of serum sickness. Serum sickness symptoms include redness and itching at the injection site, rash, hives, joint paint, fever, and feeling unwell.
Serum sickness develops 7 to 10 days after initial exposure. Antihistamines or analgesics may be prescribed to help alleviate symptoms of the condition. Patients are expected to fully recover within 2 to 4 weeks.
Text Reference: University of Maryland Medical Center: "Serum Sickness"