Side Effects

Side Effects

These are not all the possible side effects you may feel when taking FIRAZYR. If you experience any side effects not listed here, contact your healthcare professional.

Side effects may include:

  • burning, redness, swelling, pain, itching, or warmth at the injection site
  • abdominal pain or distension
  • diarrhea
  • nausea
  • fever
  • upper respiratory tract infection (common cold)
  • inflammation of the sinuses
  • nasal congestion
  • dizziness
  • headache
  • worsening or recurrence of HAE
  • rash
  • hives
  • dry mouth
  • fatigue

FIRAZYR may affect certain liver enzyme levels in your blood. Your doctor will decide when to perform blood tests and will interpret the results.

Serious Side Effects and What to do About Them

Symptom/effect

Talk with your healthcare professional

Stop taking drug and seek immediate medical help

Only if severe

In all cases

Uncommon

Arrhythmia (abnormal heart rhythms): rapid, slow or irregular heartbeat

X

Urinary Tract Infection (UTI) (infection in urinary system including kidneys, ureters, bladder and urethra): Pain or burning sensation while urinating, frequent urination, blood in urine, pain in the pelvis, strong smelling urine, cloudy urine

X

Unknown

Heart and non-heart related chest pain

X

Myocardial infarction (heart attack): pressure or squeezing pain between the shoulder blades, in the chest, jaw, left arm or upper abdomen, shortness of breath, dizziness, fatigue, light-headedness, clammy skin, sweating, indigestion, anxiety, feeling faint and possible irregular heartbeat.

X

Increased levels of liver enzymes (ALT, AST) in the blood: dark urine, fatigue, loss of appetite, yellowing of the skin or eyes

X

Symptom/effect

Uncommon

Arrhythmia (abnormal heart rhythms): rapid, slow or irregular heartbeat

Talk with your healthcare professional

Only if severe
In all cases
X Stop taking drug and seek immediate medical help

Urinary Tract Infection (UTI) (infection in urinary system including kidneys, ureters, bladder and urethra): Pain or burning sensation while urinating, frequent urination, blood in urine, pain in the pelvis, strong smelling urine, cloudy urine

Talk with your healthcare professional

Only if severe
X In all cases
Stop taking drug and seek immediate medical help

Unknown

Heart and non-heart related chest pain

Talk with your healthcare professional

Only if severe
In all cases
X Stop taking drug and seek immediate medical help

Myocardial infarction (heart attack): pressure or squeezing pain between the shoulder blades, in the chest, jaw, left arm or upper abdomen, shortness of breath, dizziness, fatigue, light-headedness, clammy skin, sweating, indigestion, anxiety, feeling faint and possible irregular heartbeat.

Talk with your healthcare professional

Only if severe
In all cases
X Stop taking drug and seek immediate medical help

Increased levels of liver enzymes (ALT, AST) in the blood: dark urine, fatigue, loss of appetite, yellowing of the skin or eyes

Talk with your healthcare professional

Only if severe
X In all cases
Stop taking drug and seek immediate medical help

If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, talk to your healthcare professional.

Please speak to your healthcare professional for more information.

Reporting Suspected Side Effects

You can report any suspected side effects associated with the use of health products to Health Canada by:

NOTE: Contact your health professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.