The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
The side effects below were reported by people who used BeneFix during clinical trials. If you're using a product besides BeneFix, the side effects you experience and your risk of side effects might be different.
- Headache (11%)
- Dizziness (8%)
- Injection site reaction (up to 8%)
- Nausea (6%)
- Pain at injection site (6%)
- Rash (up to 6%)
- Changes in taste (5%)
Less Common Side Effects
- Blurry vision
- Vomiting
- Fever
- Skin infection or inflammation at IV site
- Shaking
- Sleepiness
- Cough
- Chest tightness
- Hives
- Flushing
Benefix serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Serious allergic reaction (anaphylaxis): difficulty breathing, hives, itching, fast heartbeat, tightness in the throat, nausea, stomach pain, dizziness, lightheadedness, swelling in the face or tongue
- Blood clots: lungs (cough, difficulty breathing, chest pain), legs (redness, pain, tenderness, swelling of the skin), heart attack (chest pain, pain in the arms or shoulders, pain in the neck or jaw), stroke (difficulty speaking, numbness on one side of the body, confusion)
Source: DailyMed
The following Benefix side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor or nurse immediately if any of the following side effects occur:
Less common
Back or side pain
blurred vision
chest tightness
chills
confusion
difficult or labored breathing
fast heartbeat
itching, pain, redness, swelling, tenderness, blue discoloration, or warmth of the skin at the injection site
swelling of the foot or leg
vomiting
Incidence not known
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
cloudy or bloody urine
difficulty with swallowing
dizziness
dizziness, fainting, or lightheadedness when getting up suddenly from a lying or sitting position
headache
itching, skin rash
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
pain, redness, or swelling in the arm or leg
pains in the chest, groin, or legs, especially calves of the legs
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
restlessness
severe headaches of sudden onset
sudden loss of coordination
sudden onset of slurred speech
sudden vision changes
sweating
tenderness, pain, swelling, warmth, skin discoloration, and prominent superficial veins over affected area
trouble breathing
unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
vision problems
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Less common
Change in or loss of taste
drowsiness
feeling of warmth
pain in the arms or legs
redness of the face, neck, arms, and occasionally, the upper chest
shaking
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Other Benefix articles
Other Coagulation Factors side effects articles
Why trust our experts?
