Patient Information

VIVITROL – an antagonist at the µ-opioid receptor

Watch the videos below to learn about VIVITROL's Mechanism of Action for the treatment of opioid or alcohol dependence.

How VIVITROL works for opioid dependence

Naltrexone, the active ingredient in VIVITROL, is an opioid antagonist with the highest binding affinity to mu-opioid receptors and does not stimulate the dopamine reward pathway.1,2

VIVITROL produces a 1-month opioid blockade through a microsphere delivery system. Naltrexone is embedded on and throughout microspheres, which are designed to break down over time and gradually release naltrexone in therapeutic concentrations over a 1-month period.1

While reversible, the blockade prevents the subjective effects of opioid drugs such as euphoria. This blockade in combination with psychosocial therapy is thought to contribute to the prevention of relapse to opioid dependence.1

This video above explains the mechanism of action of VIVITROL, how VIVITROL may help, and Important Safety Information you should know before starting your patients on VIVITROL.

  • Treatment with VIVITROL is not addictive and does not lead to physical dependence or withdrawal if discontinued.1
  • Prior to initiating VIVITROL, an opioid-free duration of a minimum of 7-10 days is recommended for patients, to avoid precipitation of opioid withdrawal that may be severe enough to require hospitalization.1
  • Patients who are dependent on alcohol and abuse opioids must undergo detoxification from opioids prior to initiating VIVITROL treatment.1

References:
1. VIVITROL [prescribing information]. Waltham, MA; Alkermes, Inc; rev Dec 2015.
2. Kosten TR, George TP. The neurobiology of opioid dependence: implications for treatment. Sci Pract Perspective. 2002;1(1):13-20.

Important Safety Information

INDICATIONS

VIVITROL is indicated for:

  • Treatment of alcohol dependence in patients who are able to abstain from alcohol in an outpatient setting. Patients should not be actively drinking at the time of initial VIVITROL administration.
  • Prevention of relapse to opioid dependence, following opioid detoxification.
  • VIVITROL should be part of a comprehensive management program that includes psychosocial support.

CONTRAINDICATIONS

VIVITROL is contraindicated in patients:

  • Receiving opioid analgesics
  • With current physiologic opioid dependence
  • In acute opioid withdrawal
  • Who have failed the naloxone challenge test or have a positive urine screen for opioids
  • Who have exhibited hypersensitivity to naltrexone, polylactide-co-glycolide (PLG), carboxymethylcellulose, or any other components of the diluent

WARNINGS/PRECAUTIONS

Vulnerability to Opioid Overdose: Because VIVITROL blocks the effects of exogenous opioids for approximately 28 days after administration, patients are likely to have a reduced tolerance to opioids after opioid detoxification. As the blockade dissipates, use of previously tolerated doses of opioids could result in potentially life-threatening opioid intoxication (respiratory compromise or arrest, circulatory collapse, etc). Cases of opioid overdose with fatal outcomes have been reported in patients who used opioids at the end of a dosing interval, after missing a scheduled dose, or after discontinuing treatment. Patients and caregivers should be told of this increased sensitivity to opioids and the risk of overdose.

Any attempt by a patient to overcome the VIVITROL blockade by taking opioids may lead to fatal overdose. Patients should be told of the serious consequences of trying to overcome the opioid blockade.

Injection Site Reactions: VIVITROL injections may be followed by pain, tenderness, induration, swelling, erythema, bruising, or pruritus; however, in some cases injection site reactions may be very severe. Injection site reactions not improving may require prompt medical attention, including, in some cases, surgical intervention. Inadvertent subcutaneous/adipose layer injection of VIVITROL may increase the likelihood of severe injection site reactions. Select proper needle size for patient body habitus, and use only the needles provided in the carton. Patients should be informed that any concerning injection site reactions should be brought to the attention of their healthcare provider.

Precipitation of Opioid Withdrawal: Withdrawal precipitated by administration of VIVITROL may be severe. Some cases of withdrawal symptoms have been severe enough to require hospitalization and management in the ICU. To prevent precipitated withdrawal, patients, including those being treated for alcohol dependence:

  • Should be opioid-free (including tramadol) for a minimum of 7–10 days before starting VIVITROL.
  • Patients transitioning from buprenorphine or methadone may be vulnerable to precipitated withdrawal for as long as two weeks.

Patients should be made aware of the risk associated with precipitated withdrawal and be encouraged to give an accurate account of last opioid use.

Hepatotoxicity: Cases of hepatitis and clinically significant liver dysfunction have been observed in association with VIVITROL. Warn patients of the risk of hepatic injury; advise them to seek help if experiencing symptoms of acute hepatitis. Discontinue use of VIVITROL in patients who exhibit acute hepatitis symptoms.

Depression and Suicidality: Alcohol- and opioid-dependent patients taking VIVITROL should be monitored for depression or suicidal thoughts. Alert families and caregivers to monitor and report the emergence of symptoms of depression or suicidality.

When Reversal of VIVITROL Blockade Is Required for Pain Management: For VIVITROL patients in emergency situations, suggestions for pain management include regional analgesia or use of non-opioid analgesics. If opioid therapy is required to reverse the VIVITROL blockade, patients should be closely monitored by trained personnel in a setting staffed and equipped for CPR.

Eosinophilic Pneumonia: Cases of eosinophilic pneumonia requiring hospitalization have been reported. Warn patients of the risk of eosinophilic pneumonia and to seek medical attention if they develop symptoms of pneumonia.

Hypersensitivity Reactions: Patients should be warned of the risk of hypersensitivity reactions, including anaphylaxis.

Intramuscular Injections: As with any IM injection, VIVITROL should be administered with caution to patients with thrombocytopenia or any coagulation disorder.

ADVERSE REACTIONS

Serious adverse reactions that may be associated with VIVITROL therapy in clinical use include severe injection site reactions, eosinophilic pneumonia, serious allergic reactions, unintended precipitation of opioid withdrawal, accidental opioid overdose, and depression and suicidality. The adverse events seen most frequently in association with VIVITROL therapy for alcohol dependence include nausea, vomiting, injection site reactions (including induration, pruritus, nodules, and swelling), muscle cramps, dizziness or syncope, somnolence or sedation, anorexia, decreased appetite or other appetite disorders. The adverse events seen most frequently in association with VIVITROL in opioid-dependent patients also include hepatic enzyme abnormalities, injection site pain, nasopharyngitis, insomnia, and toothache.

You are encouraged to report negative side effects to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.

As of December 8, 2015, VIVITROL® (naltrexone for extended-release injectable suspension) has new Prescribing Information (12/2015). The Dosage and Administration, Section 2.4 Directions for Use has been updated. When administering VIVITROL, please refer to Section 2.4 Directions for Use in the VIVITROL Prescribing Information that is provided in the carton you are administering.