Like all medicines, Firazyr can cause side effects, although not everybody gets them. Almost all patients receiving Firazyr will experience a reaction at the site of the injection (such as skin irritation, swelling, pain, itchiness, erythema and burning sensation). These effects are usually mild and clear up without the need for any additional treatment.
The frequency of possible side effects listed below is defined using the following convention: very common (affects more than 1 user in 10), common (affects 1 to 10 users in 100), uncommon (affects 1 to 10 users in 1,000), rare (affects 1 to 10 users in 10,000), very rare (affects less than 1 user in 10,000), not known (frequency cannot be estimated from the available data).
Very common:
Injection site reactions (skin irritation, swelling, pain, itchiness, erythema and burning sensation).
Common:
Abnormal results from some blood test
Headache
Dizziness
Itching
Rash
Skin redness
Uncommon:
Abnormal liver function test
Asthma
Blocked nose
Bruising
Cough
Fever
Hot flushes
Increased amount of uric acid in the blood (which may indicate gout)
Increased amount of blood glucose
Muscle spasm
Nausea or vomiting
Hives
Shingles
Sore throat
Positive test for protein in your urine
Tiredness
Weakness
Weight gain
Tell your doctor immediately if you notice that the symptoms of your attack get worse after you received Firazyr.
If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.