Vivitrol

Alcohol Dependence

Vivitrol is prescribed to help individuals with alcohol dependence maintain abstinence. It is intended for patients who can stop drinking in an outpatient setting before starting the treatment. The medication helps reduce the physical urge to consume alcohol.

Opioid Dependence

Vivitrol is used to prevent relapse in people who have previously been dependent on opioid drugs. It is only administered after a patient has successfully completed opioid detoxification and has remained opioid-free for a specific period. This helps ensure the medication does not trigger sudden withdrawal symptoms.

Comprehensive Recovery Programs

This medication is meant to be one component of a broader treatment strategy. It is most effective when combined with other recovery efforts, such as:

• Individual or group counseling
• Behavioral therapies
• Participation in support groups

Mechanism of Action

Vivitrol contains naltrexone, which belongs to a class of medications called opioid antagonists. It works by binding to opioid receptors in the brain and nervous system.

Blocking Opioid Effects

When Vivitrol attaches to these receptors, it blocks the effects of opioid drugs, such as heroin or prescription pain relievers. If a person uses opioids while Vivitrol is in their system, they will not experience the typical high or euphoric effects associated with those substances.

Reducing Alcohol Cravings

For individuals with alcohol dependence, Vivitrol is thought to work by interfering with the brain's reward system. It helps to:

• Reduce the physical urge or craving to drink alcohol.
• Block the pleasurable feelings or buzz that alcohol can produce.

Vivitrol is an extended-release injection, meaning the medication is slowly released into the body over a period of about one month. It does not cause a high and is not addictive.

Common Side Effects

Many people using Vivitrol experience mild to moderate side effects. These may include:

• Nausea and vomiting
• Headache and dizziness
• Fatigue or sleepiness
• Muscle or joint aches
• Trouble sleeping (insomnia)
• Loss of appetite
• Cold-like symptoms, such as a sore throat or stuffy nose
• Mild injection site reactions, such as pain, redness, or itching

Serious Side Effects

Vivitrol can cause serious health problems that require immediate medical attention. These include:

• Severe injection site reactions: Intense pain, large areas of swelling, lumps, or skin that looks dark or dead (necrosis).
• Liver problems: Yellowing of the eyes or skin (jaundice), dark urine, or pain in the upper right stomach area.
• Severe allergic reactions: Hives, swelling of the face or throat, and difficulty breathing.
• Pneumonia: A specific type of lung inflammation that causes cough, fever, or shortness of breath.
• Depression and suicidal thoughts: Changes in mood, feeling sad or hopeless, or thoughts of hurting yourself.
• Sudden opioid withdrawal: Severe symptoms like shaking, sweating, and intense nausea if opioids were used recently.

Risk of Opioid Overdose

Vivitrol blocks the effects of opioids. If a person attempts to overcome this blockade by taking large amounts of opioids, it can lead to fatal overdose, respiratory failure, or coma. Additionally, after treatment with Vivitrol stops or when a dose is missed, sensitivity to opioids increases. This means that doses of opioids that were previously tolerated may cause a fatal overdose.

Severe Injection Site Reactions

Some people experience serious reactions at the site of injection. These may include intense pain, swelling, lumps, or skin death (necrosis). Medical attention is necessary if a reaction does not improve or worsens within two weeks, as some cases may require surgical intervention.

Precipitated Opioid Withdrawal

To avoid sudden and severe withdrawal symptoms, individuals must be free from all opioids, including prescription pain medications and street drugs, for at least 7 to 14 days before starting Vivitrol. A healthcare provider may perform a challenge test or urine screen to confirm the absence of opioids before the first dose.

Liver Injury

Naltrexone can cause liver damage or hepatitis. Healthcare providers typically monitor liver function through blood tests before and during treatment. Signs of liver problems include dark urine, yellowing of the eyes or skin (jaundice), and pain in the upper right abdomen.

Depression and Suicidality

There is an increased risk of depression, suicidal thoughts, or suicidal behavior in people taking Vivitrol. It is important to monitor for changes in mood, worsening depression, or any thoughts of self-harm.

Other Serious Conditions

• Eosinophilic pneumonia: A rare but serious lung inflammation can occur. Symptoms include shortness of breath, wheezing, or a new cough that does not go away.
• Hypersensitivity: Severe allergic reactions, including hives, rashes, or swelling of the face and throat (angioedema), require immediate medical care.

Pregnancy

It is not known whether Vivitrol will harm an unborn baby. In animal studies, high doses of naltrexone were associated with an increased risk of early pregnancy loss. Because of the lack of human data, Vivitrol should be used during pregnancy only if the potential benefit to the mother outweighs the potential risk to the fetus.

Individuals who are pregnant or planning to become pregnant should discuss their treatment options and potential risks with a healthcare provider.

Breastfeeding

Naltrexone, the active ingredient in Vivitrol, is known to pass into breast milk. It is currently unknown how the medication affects a nursing infant or milk production. Because of the potential for side effects in the infant, patients should consult with a healthcare professional to decide whether to continue breastfeeding or stop the medication.

Available Forms

Vivitrol is provided as a single-use kit for intramuscular injection. The medication is an extended-release formulation, which means it is designed to release the active ingredient slowly over time after administration.

The kit typically includes the following components:

• A vial containing the medication in the form of microspheres (powder).
• A prefilled syringe containing a sterile liquid diluent used to mix the powder into a suspension.
• Specialized needles designed for the administration of the injection.

This medication must be administered by a healthcare provider into the gluteal muscle. It is not intended for self-administration or for any other route of delivery.

FDA Approval and Indications

Vivitrol is FDA-approved for two primary uses: the treatment of alcohol dependence in patients who are able to abstain from alcohol in an outpatient setting, and the prevention of relapse to opioid dependence following opioid detoxification. It is meant to be used as part of a complete treatment program that includes psychosocial support, such as counseling or therapy.

Administration Requirements

The FDA requires that Vivitrol be administered only by a healthcare professional. It is given as an intramuscular injection into the gluteal muscle once every four weeks or once a month. It is not approved for self-administration or for injection into other areas of the body.

Safety Warnings and Precautions

The FDA-approved labeling includes several significant safety warnings and regulatory precautions:

• Risk of Opioid Overdose: Patients may have a reduced tolerance to opioids after treatment with Vivitrol. Attempting to overcome the medication's effects by taking large amounts of opioids can lead to fatal respiratory failure or circulatory collapse.
• Severe Injection Site Reactions: The FDA has issued warnings regarding serious reactions at the site of injection, such as pain, swelling, or tissue death (necrosis), which may require surgical intervention.
• Hepatotoxicity: Naltrexone has the potential to cause liver injury or hepatitis. Healthcare providers typically monitor liver function through blood tests before and during treatment.
• Precipitated Withdrawal: To avoid severe and sudden withdrawal symptoms, the FDA requires that patients be opioid-free for a minimum of 7 to 10 days before receiving their first dose.

Withdrawal and Vivitrol

Vivitrol is an opioid antagonist and is not habit-forming. Because it does not produce a physical dependence, you will not experience withdrawal symptoms when you stop treatment. However, the relationship between Vivitrol and opioid withdrawal is significant in other ways.

Precipitated Withdrawal

If Vivitrol is injected while opioids are still present in your system, it will cause sudden and severe opioid withdrawal. This is called precipitated withdrawal. To prevent this, healthcare providers require that you are opioid-free for at least 7 to 14 days before starting the medication. This includes avoiding medications like methadone or buprenorphine.

Symptoms of precipitated withdrawal may include:

• Severe nausea and vomiting
• Stomach cramps and diarrhea
• Muscle aches and joint pain
• Extreme anxiety or restlessness
• Trouble sleeping

Risks After Discontinuation

Once you stop receiving Vivitrol injections, the blocking effect on opioid receptors eventually wears off. During treatment, your tolerance for opioids decreases significantly. If you resume opioid use after stopping Vivitrol, even small amounts of opioids can lead to a life-threatening or fatal overdose.