Nevertheless you should be aware of the early signs of allergic reactions such as burning and stinging at the injection site, chills, flushing, rash, hives, breathing difficulty, nausea, headache, lethargy, low blood pressure, and tightness of the chest. • The following side effects were very rarely observed during clinical studies (less than 1 case in 10 000 administrations given to patients): fever (pyrexia), increased C-reactive protein, wheals (urticaria), itching (pruritus), rash and dizziness. • In the postmarketing experience there have been reports of restlessness, bleeding into the chest, excessive sweating, increased body temperature, and increased need for catecholamines (medicine to elevate blood pressure) in the course of the treatment.