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
- Injection site reactions, including pain, itching, and swelling (up to 21%)
- Headache (8%)
- Constipation (8%)
- Nausea (7%)
- Difficulty sleeping (6%)
- Urinary tract infection (5%)
Less Common Side Effects
- Upper respiratory tract infection
- Vomiting
- Diarrhea
- Joint pain
- Anxiety
Brixadi serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Opioid withdrawal: suicidal thoughts, anxiety, restlessness, runny nose, yawning, sweating, chills, wide pupils, irritability
- Dangerously slow breathing: trouble breathing; bluish-colored lips, fingers, or toes
- Serious allergic reactions: rash, hives, shortness of breath, low blood pressure, fast heartbeat, dizziness, flushing (feeling warm all of a sudden), fatigue
- Heart rhythm problems: chest pounding, fluttering in the chest, difficulty breathing, chest pain, feeling faint or lightheaded
Source: DailyMed
The following Brixadi side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- CNS depression—slow or shallow breathing, shortness of breath, feeling faint, dizziness, confusion, trouble staying awake
- Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing
- Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
- Low adrenal gland function—nausea, vomiting, loss of appetite, unusual weakness or fatigue, dizziness
- Low blood pressure—dizziness, feeling faint or lightheaded, blurry vision
- Pain or trouble swallowing, heartburn, chest pain
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
- Constipation
- Dizziness
- Drowsiness
- Dry mouth
- Headache
- Nausea
- Pain, redness, or irritation at injection site

