Vivitrol for Alcohol: The Monthly Shot Explained
Quick Answer
Vivitrol is naltrexone in extended-release injectable form, the same drug as naltrexone pills, delivered as one shot per month. It eliminates the daily pill adherence problem and significantly improves real-world treatment retention. List price is ~$1,500/month but most insurance covers it. You don't need to be sober to start (only opioid-free for 7–10 days).
The biggest challenge with oral naltrexone isn't that it doesn't work, it's that people stop taking it. Studies show fewer than 20% of patients are still taking daily pills at 6 months. Vivitrol solves this with a once-monthly injection, maintaining consistent blood levels for 28–30 days regardless of daily willpower.
What Is Vivitrol?
Vivitrol is the brand name for extended-release injectable naltrexone, manufactured by Alkermes. It contains the same active ingredient as naltrexone pills, just in a microsphere formulation that slowly dissolves over a month after injection into the gluteal muscle (buttock).
The extended-release formulation maintains steady blood naltrexone levels without the peaks and troughs of daily oral dosing, and completely eliminates the issue of patients skipping doses when motivation is low.
Vivitrol vs Oral Naltrexone: Which Is Better?
Vivitrol (injection)
- No daily pills to remember
- Consistent blood levels for 30 days
- Better real-world retention
- Can't "cheat" by skipping before drinking
- ~$1,500/month list price
- Must visit provider monthly
- Can't use Sinclair Method
- Injection site reactions
Oral Naltrexone (pills)
- $20–50/month without insurance
- Can use Sinclair Method
- Easy to stop/adjust
- Can take at home
- Daily adherence required
- <20% still taking at 6 months
- Easy to skip before drinking
- Blood levels vary with dosing
How to Get Vivitrol
- Get a prescription: Any licensed prescriber can prescribe Vivitrol, GPs, addiction medicine specialists, psychiatrists, and nurse practitioners. Telehealth services can also prescribe and coordinate injection with a local provider.
- Prior authorization: Most insurance requires a prior authorization documenting alcohol use disorder diagnosis. Your prescriber's office usually handles this.
- Find an injection site: Vivitrol must be given by a healthcare professional. Many pharmacies (CVS, Walgreens) now administer it. SAMHSA's treatment locator (findtreatment.gov) can locate nearby providers.
- Co-pay assistance: Visit vivitrol.com/coverage, Alkermes' program can reduce out-of-pocket cost to $0 for commercially insured patients who qualify.
Before your first injection: You must be opioid-free for at least 7–10 days. If opioids are present in your system when you receive Vivitrol, it will precipitate rapid, severe opioid withdrawal. This does not apply to alcohol. You do not need to be alcohol-free to start.
What to Expect at Your Appointment
The Vivitrol injection takes about 5 minutes. It's given into the gluteal muscle (upper-outer buttock) by a nurse or physician. A urine drug screen may be done beforehand to confirm opioid absence. Expect mild soreness at the injection site for 1–2 weeks.
Most people notice reduced cravings and a "flat" response to alcohol within the first 1–2 weeks after the injection. The effect is consistent throughout the month rather than peaking and fading like daily pills.
Side Effects
- Injection site reactions (most common): Pain, swelling, bruising, or hardness at the injection site. Usually resolves within 2 weeks. Rarely, severe reactions can occur, contact your provider if you notice increasing pain, discharge, or open sores.
- Nausea: Less common than with oral naltrexone due to slower absorption. Usually mild and resolves in the first week.
- Fatigue and decreased appetite: Common in the first few weeks.
- Opioid blockade: Opioid pain medications won't work for the full month. Always inform treating physicians, dentists, and anesthesiologists.
- Mood changes: Some patients report emotional blunting. Tell your prescriber if this affects daily life.
Who Should Consider Vivitrol
Vivitrol is particularly well-suited for people who:
- Have tried oral naltrexone but struggled with daily adherence
- Know they would skip pills before a planned drinking occasion
- Want the "commitment device" of a medication they can't undo
- Are in early recovery with strong cravings and high relapse risk
- Have Medicaid or insurance that covers it with manageable cost
Oral naltrexone may be preferable for people who want flexibility, are using the Sinclair Method, cannot afford Vivitrol's cost, or who prefer not to receive monthly injections.
Frequently Asked Questions
How does Vivitrol work for alcohol use disorder?
Vivitrol (naltrexone extended-release injectable) works by blocking opioid receptors in the brain, specifically the mu-opioid receptors that mediate alcohol's rewarding and pleasurable effects. When someone on Vivitrol drinks alcohol, the expected euphoria and reward are significantly blunted. This reduces the positive reinforcement that drives continued drinking. The monthly injection format is a key advantage: it removes the daily decision of whether to take medication, which is critical because ambivalence about sobriety often peaks at exactly the moments of highest craving. Vivitrol is most effective when combined with counseling or behavioral support, the medication reduces the neurobiological pull of alcohol while therapy addresses behavioral patterns and coping skills.
Who is a good candidate for Vivitrol?
Vivitrol candidacy: good candidates are people with alcohol use disorder who: have completed or are in medically supervised detox (Vivitrol cannot be started while someone is physically dependent on opioids or alcohol. There must be an opioid-free period of 7-10 days), are motivated to reduce or abstain from alcohol, prefer a monthly injection over daily oral medication, have a history of difficulty with daily pill adherence. Not appropriate for: people currently using opioids (including prescription opioids, buprenorphine, or methadone), Vivitrol will precipitate acute opioid withdrawal, people with acute hepatitis or liver failure, pregnancy. Medical evaluation: a prescribing physician will assess liver function and opioid use status before starting Vivitrol.
What are the side effects of Vivitrol?
Vivitrol side effects: injection site reactions: the most common adverse effect, pain, tenderness, swelling, or bruising at the injection site. In rare cases, severe injection site reactions including tissue necrosis have been reported. Systemic: nausea (most common systemic side effect, typically resolves in the first few weeks), headache, fatigue, decreased appetite, dizziness, somnolence. Depression and suicidality: Vivitrol carries a warning about depressed mood and suicidal ideation, patients should be monitored, and any new or worsening depression should be reported immediately. Hepatotoxicity: naltrexone can cause liver damage at high doses, liver function should be monitored. Opioid blockade: if you need opioid pain management for surgery or injury while on Vivitrol, this requires careful medical coordination.
How effective is Vivitrol compared to oral naltrexone?
Vivitrol vs. oral naltrexone: both contain naltrexone but differ in formulation and delivery. Oral naltrexone (daily pill) and Vivitrol (monthly injection) have comparable efficacy when oral naltrexone is taken consistently, the key word being 'consistently.' Clinical trials: adherence to daily oral naltrexone is poor in real-world settings (many patients stop taking it within weeks). Vivitrol's monthly injection eliminates the daily adherence problem, once injected, the patient has medication coverage for 30 days regardless of daily motivation. Studies comparing Vivitrol to oral naltrexone in real-world settings consistently show better outcomes with Vivitrol, primarily because of the adherence advantage rather than pharmacological differences. Vivitrol is the preferred formulation for patients with a history of poor medication adherence.
Can you drink on Vivitrol?
Drinking on Vivitrol: Vivitrol does not make you physically ill if you drink (unlike disulfiram/Antabuse, which causes aversive reactions). You can drink on Vivitrol. However: the rewarding effects of alcohol are significantly blunted, the buzz, euphoria, and anxiety relief are reduced. Many patients report that drinking on Vivitrol feels 'flat' or unrewarding. This pharmacological effect is the mechanism by which Vivitrol reduces drinking, without the reward, the motivation to drink is reduced. Some patients do continue to drink while on Vivitrol, but typically drink less. Vivitrol works best when the patient's goal is abstinence or significant reduction, and when combined with behavioral support that reinforces the medication's effect.
How long should someone stay on Vivitrol?
Vivitrol treatment duration: there is no single correct duration, treatment should be individualized. Standard recommendation: the Vivitrol manufacturer and most clinical guidelines suggest at least 6 months of treatment to see meaningful benefit and to allow behavioral change to take root. Many patients benefit from 12-24 months or longer. Factors supporting longer treatment: high relapse risk, limited behavioral/social support, previous relapse after stopping medication, ongoing environmental triggers. Stopping: Vivitrol does not produce physical dependence and can be stopped at any time without withdrawal. However, stopping medication increases relapse risk, the decision to discontinue should be made with the prescribing provider after a period of sustained sobriety and established behavioral coping.
Does Vivitrol help with cravings?
Vivitrol and alcohol cravings: yes, Vivitrol reduces alcohol cravings through its opioid receptor blockade. The mechanism: alcohol's reinforcing effects are mediated partly through endogenous opioid release, blocking opioid receptors reduces the motivational pull toward alcohol, including the anticipatory craving state. Clinical evidence: patients on naltrexone consistently report reduced craving intensity in clinical trials. The craving reduction is partial, not complete, cravings can still occur, particularly during early treatment or high-stress periods. Vivitrol is most effective against cue-triggered cravings (situations, places, or emotional states associated with drinking) rather than purely physiological cravings. The combination of Vivitrol's craving reduction with behavioral coping strategies addresses both the neurobiological and psychological components of craving.
What is the Sinclair Method and how does it relate to Vivitrol?
The Sinclair Method: a specific protocol using naltrexone (the same molecule as Vivitrol) for alcohol reduction, developed by Dr. David Sinclair. The method: take oral naltrexone 1-2 hours before any drinking session, not as a daily medication. Continue drinking (do not attempt to abstain). Over months, the pharmacological extinction of alcohol's reward gradually reduces the desire to drink. Vivitrol vs. Sinclair Method: Vivitrol provides continuous receptor blockade throughout the month, compatible with abstinence goals and eliminating the need to pre-dose. The Sinclair Method specifically requires drinking on the medication to achieve pharmacological extinction, incompatible with abstinence goals and requires oral naltrexone (not injectable). Both approaches use naltrexone's opioid blockade mechanism but for different treatment goals and populations.
Is Vivitrol covered by insurance?
Vivitrol insurance coverage: Vivitrol is FDA-approved for alcohol use disorder and opioid use disorder. Both indications are generally covered by insurance. Coverage specifics: most commercial insurance plans cover Vivitrol with prior authorization (the prescriber must document the diagnosis and prior treatment). Medicare Part D covers Vivitrol. Medicaid coverage: varies by state, most state Medicaid programs cover Vivitrol for alcohol or opioid use disorder. Cost without insurance: Vivitrol injections are expensive (approximately $1,200-1,500 per injection without insurance). Alkermes (the manufacturer) has a patient assistance program for uninsured or underinsured patients. If coverage is denied: the prescribing physician can provide medical necessity documentation supporting appeal. SAMHSA's National Helpline (1-800-662-4357) can help navigate insurance and access treatment resources.
How do I find a Vivitrol provider?
Finding a Vivitrol provider: Vivitrol is prescribed and administered by physicians, nurse practitioners, and other licensed prescribers in outpatient settings. Finding a provider: SAMHSA's treatment locator (findtreatment.gov) lists providers by location. The Vivitrol website has a provider finder tool. Your primary care physician can prescribe Vivitrol if comfortable with addiction medicine. Addiction medicine specialists and psychiatrists commonly prescribe Vivitrol. What to expect: the first appointment includes a medical history review, liver function testing, assessment for opioid use (opioid-free period required), and education about the medication. The injection itself takes only a few minutes. Monthly follow-up appointments for the injection can often be brief. Many practices offer injection appointments as brief, dedicated visits.
What happens if I miss a Vivitrol injection?
Missing a Vivitrol injection: Vivitrol provides approximately 30 days of naltrexone coverage. If you miss your scheduled monthly injection: the naltrexone blood level gradually falls after about 28-30 days. Within days to weeks of the missed injection, opioid receptor blockade diminishes and alcohol's rewarding effects are no longer blunted. This increases relapse risk. What to do: reschedule the missed injection as soon as possible, a late injection still provides benefit. Contact your prescribing provider. Be aware of increased vulnerability in the window between missed and rescheduled injection. This is a high-risk period. Behavioral strategies (avoiding high-risk situations, contacting support people, increasing meeting attendance) are particularly important during any gap in Vivitrol coverage.
Can Vivitrol be used for opioid use disorder too?
Vivitrol for opioid use disorder: yes, Vivitrol is FDA-approved for both alcohol use disorder and opioid use disorder. For opioid use disorder: Vivitrol blocks opioid receptors, eliminating the euphoric effect of opioids if the patient uses them while on medication. For opioid use disorder, Vivitrol is one of three FDA-approved medications, the others are buprenorphine (Suboxone) and methadone. Key difference from buprenorphine/methadone: Vivitrol is an antagonist (blocks opioid receptors) rather than an agonist (activating opioid receptors at a controlled level). For opioid use disorder specifically: the opioid-free requirement before starting Vivitrol is 7-10 days, a significant barrier because many patients experience severe withdrawal during this waiting period. For alcohol use disorder, the opioid-free requirement is less clinically challenging.
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