Precipitated Opioid Withdrawal Warning:
You must avoid all opioid use for at least 7-14 days before starting Vivitrol. Taking opioids within this time frame can result in severe precipitated opioid withdrawal, characterized by nausea, vomiting, diarrhea, muscle aches, anxiety, and increased heart rate. If unsure whether you’ve been opioid-free for this period, contact your provider immediately.
Overdose Risk:
Vivitrol blocks opioid effects, and attempting to overcome this by taking large amounts of opioids (such as heroin or prescription pain pills) can cause serious injury, coma, or death.
Liver Damage:
Naltrexone, the active ingredient in Vivitrol, may cause liver damage or hepatitis. Contact your healthcare provider if you experience symptoms such as stomach pain, dark urine, yellowing of the whites of your eyes, or unusual fatigue.
Injection Site Reactions:
Reactions at the site of injection include necrosis, pain, tenderness, swelling, redness, bruising, or itching.
Common Side Effects:
Mild nausea, tiredness, headache, vomiting, decreased appetite, and joint/muscle pain are possible. These side effects usually resolve within a few days.
Dizziness:
Vivitrol may cause dizziness. Avoid driving or operating heavy machinery until you know how Vivitrol affects you.
Allergic Pneumonia:
Vivitrol may cause allergic pneumonia. Seek medical attention if you develop breathing difficulties, coughing, or wheezing.
Depression:
Vivitrol may cause depression. Contact your provider if you experience depressive symptoms.
For detailed information, refer to the Vivitrol Medication Guide