Sublocade (monthly injection) vs Suboxone film

Sublocade vs Suboxone at a Glance

Here is the side-by-side view. Suboxone in this table means the brand film and its generic buprenorphine/naloxone films and tablets, which work the same way.

Feature	Suboxone film	Sublocade injection
What it contains	Buprenorphine plus naloxone, in a 4:1 ratio	Buprenorphine only, in an extended-release depot
Form	Film that dissolves under the tongue	Injection under the skin (subcutaneous)
How often	Daily	Monthly, at least 26 days apart
Who gives it	You, at home	A healthcare provider only, in a clinic or office
Dose flexibility	High: your prescriber can adjust the daily amount quickly	Lower: two strengths (100 mg and 300 mg), adjusted month to month
Blood levels	Rise after each dose and dip before the next	Released slowly from the depot, so levels stay steadier
Dental warning	Yes, FDA 2022 warning for medicines dissolved in the mouth	Not identified by the FDA for the injection
Diversion risk	Take-home doses can be lost, sold, or taken by others	Nothing to take home; given under a restricted safety program
Storage	Room temperature at home, locked away	Refrigerated by the clinic; can sit at room temperature up to 12 weeks before use
Cost and coverage	Generics widely covered; pharmacy copay	Higher list price; often needs prior authorization and may be billed through the medical or pharmacy benefit

If you want a deeper look at the active ingredient itself, our guide to buprenorphine vs Suboxone explains why the naloxone is there and what it does (and does not) do.

How the Depot Works vs How the Film Works

Buprenorphine is a partial opioid agonist. It attaches tightly to the same brain receptors that heroin, fentanyl, and pain pills use, but it switches them on only part of the way. That is enough to calm cravings and prevent withdrawal without the full high. It also lets go of the receptor slowly, which is part of why it lasts so long.

The film: a daily wave

When the film melts under your tongue, buprenorphine passes through the lining of your mouth into your blood. Levels climb over the next few hours, then slowly fall until your next dose. For most people this wave is smooth enough to feel steady all day. Some people notice a dip late in the day, which is one reason prescribers sometimes split the daily dose.

The naloxone in the film is barely absorbed under the tongue, so it mostly sits on the sidelines. It becomes active if someone tries to inject the film, which triggers withdrawal and discourages misuse.

The injection: a slow-release reservoir

Sublocade is a liquid when it goes in. Once it meets the fluid under your skin, it turns into a solid lump called a depot. Over the following weeks, that depot releases buprenorphine little by little. Instead of a daily wave, you get a long, gentle slope.

You may be able to feel the lump under your skin for a few weeks. That is normal. The label advises against rubbing or massaging it, because that could change how the medicine is released.

That same solid depot is the reason Sublocade comes with a strict safety program. If someone were to inject it into a vein, it could form a solid mass in the bloodstream and cause serious harm or death. So Sublocade is available only through a restricted program (a REMS), shipped to the clinic, and never handed to a patient to take home.

Starting Each One

Starting Suboxone film

Suboxone is usually started once you are in moderate withdrawal. Starting too soon, while heroin, fentanyl, or pain pills still sit on your receptors, can trigger sudden, intense withdrawal. Your prescriber decides timing, often with a checklist called the Clinical Opiate Withdrawal Scale. The first doses may happen in the office or at home with clear instructions, followed by adjustments over the first days and weeks.

Starting Sublocade: the old way

For years, the label required at least 7 days on under-the-tongue buprenorphine before the first injection. The idea was to make sure your body handled buprenorphine well before committing to a month-long dose. The standard schedule then calls for 300 mg monthly for the first two months, followed by 100 mg monthly as maintenance, with at least 26 days between injections. Your prescriber can adjust that pattern.

The 7-day lead-in was a real barrier. People in early recovery often drop out in that first week, especially those using fentanyl, where cravings and withdrawal can be harsh.

Sublocade rapid initiation (the 2025 label change)

In February 2025, the FDA approved two changes to the Sublocade label:

• Rapid initiation: some patients can receive the first injection after a single 4 mg dose of under-the-tongue buprenorphine and about an hour of observation to confirm they tolerate it. In this schedule, the second 300 mg injection can be given one week after the first, instead of a month later.
• More injection sites: besides the abdomen, the injection can now be given in the thigh, buttock, or back of the upper arm. That gives people more options for comfort and for rotating sites.

The change was supported by a study of 729 participants, 77.5% of whom tested positive for fentanyl when treatment started. More people in the rapid group came back for their second injection (66.4%) than in the standard group (54.5%), according to the manufacturer’s announcement of the label changes. Staying in treatment through those early weeks matters, since dropping out is when relapse and overdose risk climbs.

Rapid initiation is not right for everyone. Your prescriber still decides whether you are ready, and you still need to be in some withdrawal before that first small dose. But the old idea that the shot is only for people already settled on films is out of date.

Sublocade Side Effects Compared With Suboxone Film

When people compare Sublocade vs Suboxone side effects, they often expect big differences. Because the active drug is the same, much of the list overlaps. What differs is where the medicine goes in and how it is delivered.

Side effect	Suboxone film	Sublocade injection
Constipation	Common	Common
Headache, nausea, vomiting	Common	Common
Sweating, trouble sleeping	Common	Can occur
Mouth effects (numbness, painful tongue, redness)	Yes, from the film dissolving	No
Tooth decay and dental problems	FDA warning applies	Not identified by the FDA
Injection-site itching, pain, or redness	No	Common
Raised liver enzymes	Possible; labels recommend liver tests	Listed among common effects
Tiredness	Possible	Listed among common effects

Some serious risks apply to both. Mixing buprenorphine with benzodiazepines, alcohol, or other sedatives can slow breathing dangerously, and buprenorphine’s “ceiling effect” does not protect you from that combination. Our article on Suboxone and Xanax covers that risk in detail. Liver problems, allergic reactions, low blood pressure when standing, and adrenal problems are rare but listed on the labels.

One difference people underestimate: with the film, if a side effect bothers you, your prescriber can lower tomorrow’s dose. With Sublocade, the dose already given will keep releasing for weeks. Side effects may ease as your body adjusts, but you cannot take a dose back.

On the other side, many people on films have dealt with the dental warning. In 2022 the FDA warned about tooth decay, infections, and tooth loss with buprenorphine that dissolves in the mouth, and it did not identify the same concern with the injection. If your teeth are already fragile, that can tip the balance. Read more in our guide to Suboxone and tooth decay.

Which Fits Your Life? Real-World Scenarios

People often ask, “Is Sublocade better than Suboxone?” A more useful question is, “Better for whom, and for what?” These everyday situations show how the choice can tilt one way or the other.

Your situation	What tends to fit	Why
You travel a lot or work long, unpredictable shifts	Often Sublocade	No films to pack, refill, or protect while on the road. Plan injection dates around trips.
You want control over your dose	Often Suboxone film	Daily dosing lets your prescriber fine-tune quickly if cravings rise or side effects show up.
You worry about missing doses	Often Sublocade	Once the injection is in, the medicine keeps working whether or not you remember.
You fear needles	Often Suboxone film	The injection uses a needle every month. Some people find it quick and tolerable; others never get used to it.
Someone in your home could find your medicine	Often Sublocade	Nothing to store at home means no risk to children, pets, or visitors.
Your teeth are already in poor shape	Worth discussing Sublocade	The FDA dental warning covers dissolving forms, not the injection.
You can’t easily get to a clinic monthly	Often Suboxone film	Films can be picked up at a pharmacy; injections need a visit.
You are pregnant or planning a pregnancy	Talk it through with your prescriber	Sublingual buprenorphine has the longest track record in pregnancy. Research on the monthly injection in pregnancy is more limited, so your care team weighs the options with you.

Some people also think about privacy. With Sublocade there is no pharmacy pickup each week or month, and nothing in your bag or car. For people in a tense living situation, or who have had films stolen, that can be a quiet relief.

Others value the daily ritual. Taking a film each morning can feel like a small, deliberate act of recovery. Neither feeling is wrong, and in a Sublocade vs Suboxone decision, your own sense of what keeps you steady deserves real weight.

What both options share matters more than what separates them. A 2019 report from the National Academies of Sciences, Engineering, and Medicine concluded that medications for opioid use disorder save lives. The form you can stick with is the one that does that job for you.

Cost and Insurance

Generic buprenorphine/naloxone films and tablets are widely available and usually the least expensive option. Most Medicaid plans and many private plans cover them with a regular pharmacy copay.

Sublocade has a much higher list price. Coverage varies a lot. Some plans cover it under the pharmacy benefit, with the medicine shipped from a specialty pharmacy to your clinic. Others cover it under the medical benefit, billed by the clinic. Prior authorization is common. Before you switch, ask your clinic’s billing staff to check your coverage and estimate your out-of-pocket cost. If you are still looking for care, our guide to finding a Suboxone provider covers insurance questions to ask.

Switching From Suboxone to Sublocade (and Back)

For many people, the Sublocade vs Suboxone question comes up later, not at the start. Switching from Suboxone to Sublocade is common, and it is usually straightforward because you are already on buprenorphine. Your body is used to the drug, so there is no risk of the sudden withdrawal that can happen when buprenorphine displaces a full opioid.

What a typical switch involves:

1. A conversation about why. Missed doses, dental problems, travel, or wanting fewer daily reminders are all good reasons to bring up.
2. A coverage check. The clinic confirms insurance and orders the medicine through the restricted program.
3. The first injection. Many people get their first shot while already stable on films. Your prescriber tells you when to take your last film.
4. A check-in. You will usually be seen again soon to see how you feel and whether cravings are under control.
5. Monthly visits. Injections continue on the schedule your prescriber sets, at least 26 days apart.

Some people notice a short adjustment period. Levels from the first injection build up over time, and the first weeks may feel different from your film routine. If you have cravings or withdrawal symptoms during the switch, tell your clinic. Prescribers can add short-term support rather than leaving you to push through.

Going back from Sublocade to films is also possible. Because buprenorphine from the depot fades slowly, the timing of the first film is set by your prescriber based on when your last injection was and how you feel. Some people make that switch for cost, needle discomfort, or pregnancy planning.

If you are also weighing methadone or a non-opioid approach, our comparisons of Suboxone vs methadone and naltrexone vs Suboxone explain how those very different options compare.

What About Brixadi?

Sublocade is not the only extended-release buprenorphine injection. Brixadi is a second option, and it adds flexibility that Sublocade does not have.

• Weekly or monthly: Brixadi comes in weekly doses (8, 16, 24, and 32 mg) and monthly doses (64, 96, and 128 mg).
• More steps on the ladder: with seven strengths, the dose can be fine-tuned more than with Sublocade’s two.
• Quick start: some patients can begin Brixadi after a single 4 mg test dose of buprenorphine.

In a Brixadi vs Sublocade decision, the weekly option can appeal to people who want the protection of an injection but closer contact with their care team early on, or who want to step down gradually. As with Sublocade, a healthcare provider gives the injection. Which product a clinic offers often depends on its setup and on your insurance.

Other buprenorphine forms exist too, including buprenorphine-only tablets, the Zubsolv tablet, and the discontinued Bunavail film. See Suboxone vs Subutex and Bunavail vs Suboxone for those comparisons.

Stopping Sublocade vs Suboxone: The Slow Fade vs the Step-Down

Buprenorphine treatment has no set end date. Guidelines from the American Society of Addiction Medicine set no time limit, and many people do best staying on it long term. A large study of nearly 9,000 adults found that about 5% had a medically treated overdose in the six months after stopping buprenorphine, whether they had been in treatment for 6 months or 18. That 2020 study in the American Journal of Psychiatry is a good reminder that stopping is a big decision. We go deeper in how long to stay on Suboxone.

If you and your prescriber do decide to stop, the two medicines behave very differently.

Stopping Suboxone film

With films, stopping usually means a gradual taper: small dose reductions over weeks or months, at a pace you help set. You can pause, slow down, or go back up if things get rough. That control is one of the film’s biggest strengths at the end of treatment. Our guide to tapering off Suboxone explains what a well-planned taper looks like.

Stopping Sublocade

With Sublocade, the taper is built in. After the last injection, buprenorphine levels fall slowly over months as the depot runs out. Withdrawal, if it comes, tends to be delayed and gradual rather than sudden. Buprenorphine can stay detectable in your body for months.

The flip side is that you cannot speed it up or reverse it. If cravings rise as levels drop, the fix is another conversation with your prescriber, which might mean resuming injections or switching to films. Either way, tolerance to opioids drops as levels fall, so a relapse during this period carries a high overdose risk. Keep naloxone at home and make sure people close to you know where it is.

Sublocade vs Suboxone: Frequently Asked Questions

Is Sublocade better than Suboxone?

Neither is better for everyone. Both use buprenorphine to treat opioid use disorder and both reduce overdose risk when taken as prescribed. Sublocade removes the daily dose and the risk of missed or lost films, while Suboxone film offers more day-to-day dose control and lower cost. The best choice depends on your routine, history, and coverage.

How fast can I start Sublocade?

Since a February 2025 label change, some people can receive the first Sublocade injection after a single 4 mg dose of under-the-tongue buprenorphine and about an hour of observation. Before that, the label required at least 7 days on transmucosal buprenorphine first. Your prescriber decides which approach is safe for you.

Does the Sublocade injection hurt?

Many people feel a pinch and some burning or soreness at the injection site, and itching or redness afterward is common. You may feel a small lump under the skin for a few weeks, which is the depot slowly releasing medicine. Do not rub or massage it, and tell your clinic if the area becomes very painful, hot, or swollen.

Can I take Suboxone films while on Sublocade?

Only if your prescriber tells you to. Some clinicians add short-term films during a switch or if cravings break through, but taking extra buprenorphine on your own can raise side effects. Call your clinic if the injection does not seem to be holding.

Does Sublocade cause tooth decay like Suboxone film?

The FDA’s 2022 dental warning applies to buprenorphine products that dissolve in the mouth, such as films and sublingual tablets. The agency did not identify the same concern with injectable buprenorphine like Sublocade. Regular dental checkups are still a good idea for everyone in recovery.

What happens if I miss a Sublocade appointment?

Because the depot releases medicine slowly, a short delay usually does not cause sudden withdrawal, but buprenorphine levels keep falling. Call your clinic as soon as you can to reschedule. Your prescriber will decide when to give the next injection and whether you need any bridge medicine.

Is Brixadi the same as Sublocade?

Both are extended-release buprenorphine injections given by a healthcare provider, but Brixadi comes in weekly and monthly versions with more strength options. Sublocade is monthly only, with two strengths. Which one your clinic uses often depends on availability, insurance, and how much dose flexibility you need.

How long does Sublocade stay in your system after the last shot?

Buprenorphine from Sublocade fades slowly and can remain detectable for months after the final injection. This gradual decline is why withdrawal after stopping tends to be delayed and milder at first. It also means tolerance drops slowly, so overdose risk rises over time if opioid use resumes.

The Takeaway

The Sublocade vs Suboxone choice comes down to how you want to live with your medicine, not which one is more powerful. The daily film gives you control, lower cost, and easy access at the pharmacy. The monthly injection takes daily doses off your plate, removes take-home risks, avoids the dental warning, and, since 2025, can be started much faster. Brixadi adds a weekly option in between.

Whatever you choose, the goal is the same: staying in treatment long enough for your life to rebuild. If your current form is not working, ask about switching rather than stopping. Either path is real recovery.

This article is for education only and is not medical advice. Do not start, stop, or change any medicine without talking to your prescriber. Buprenorphine is a controlled substance and should only be used with a valid prescription, exactly as directed. If you think someone has overdosed, call 911. For free, confidential help with substance use, call the SAMHSA National Helpline at 1-800-662-4357.

Sources

• Indivior: FDA approval of label changes for Sublocade injection (February 2025)
• DailyMed (NLM): Sublocade and buprenorphine/naloxone sublingual film prescribing information
• FDA Drug Safety Communication: Dental problems with buprenorphine medicines dissolved in the mouth (2022)
• Williams AR et al. Acute care, prescription opioid use, and overdose following discontinuation of long-term buprenorphine treatment. American Journal of Psychiatry, 2020
• National Academies of Sciences, Engineering, and Medicine: Medications for Opioid Use Disorder Save Lives (2019)
• SAMHSA National Helpline