Opioid Detox: What Happens in a Medical Detox Program

Opioid detox is withdrawal from opioids managed by a clinical team. That includes prescription painkillers, heroin, fentanyl and methadone. Federal guidance describes detox as three jobs: evaluating the person, getting them through withdrawal to a medically stable state, and preparing them to enter treatment [1]. With opioids, the third job carries the most weight. Most opioid overdose deaths occur in people who have just detoxed [2].

This page is for someone weighing a detox program this week, for themselves or for a person they love. It covers what detox does, where it happens, which medications are used and why, the overdose risk after detox, and what to ask when you call. It says what the sources say. It gives no amounts or schedules. For detox across every substance, start with our main medical detox page.

What Medical Detox Does for Opioid Withdrawal

Detox starts with an evaluation. Federal guidance says it tests for drugs in the blood and screens for other mental and physical conditions. It also looks at the person’s health and home life [1]. That evaluation becomes the basis of the first treatment plan [1]. Next comes stabilization, which means getting the person through withdrawal. It is often done with the help of medications [1]. Last comes getting the person ready to follow through with the rest of their care [1].

The process is the same across opioids. The clock is not. TIP 45 gives withdrawal timelines drug by drug, not for opioids as a class. Heroin withdrawal typically begins 8 to 12 hours after the last dose and subsides within 3 to 5 days [3]. Methadone withdrawal typically begins 36 to 48 hours after the last dose, peaks after about 3 days, and gradually subsides over 3 weeks or longer [3]. The same chapter says the start, strength and length of withdrawal vary with the drug. They also vary with how long it was used, how much was used each day and the time between doses [3]. Symptoms are covered on our page about opioid withdrawal symptoms and timeline. Fentanyl has its own page on fentanyl medical detox.

How dangerous is the withdrawal itself? Uncomplicated opioid withdrawal is rarely life-threatening on its own. TIP 45 says that unlike alcohol and sedative withdrawal, uncomplicated opioid withdrawal is not life-threatening [3]. It also says that, rarely, severe vomiting or diarrhea can lead to dehydration or an imbalance of the body’s salts and minerals. Heart illness could also be made worse [3]. MedlinePlus adds a third risk: breathing vomit into the lungs, which can cause a lung infection [2]. It also says that withdrawing from opioids on your own can be very hard and may be dangerous [2].

Comfort is part of the job too. TIP 45 does not advise clinicians to manage serious opioid withdrawal without medication. Doing so can cause needless suffering [3].

Inpatient or Outpatient: How the Setting Is Chosen

For opioid withdrawal, TIP 45’s panel says a hospital or some form of 24-hour medical care is generally the preferred setting. Its reasons are safety and humane care [3]. Where a hospital is not available, it points to a setting with a high level of nursing and medical backup around the clock [3]. “Generally” is the source’s word. It is a starting point, not a rule for every person.

Here is how TIP 45’s settings chapter describes the main options.

• Inpatient detox gives 24-hour supervision, observation and support. Its job is meant to be narrow. It makes the person medically stable, which includes starting and tapering withdrawal medications. Then it links them to the next service [4]. A physician should be available to assess the person within 24 hours of admission, or sooner if needed [4].
• Ambulatory detox is done on an outpatient basis. It is considered right only when the person has a positive and helpful social support network [4].
• A partial hospitalization or intensive outpatient program can manage mild to moderate withdrawal. The person is on site for several hours a day. Physicians and nurses should be available during the treatment day [4]. Our partial hospitalization program page describes that level.
• An emergency room or urgent care center can assess someone and begin detox. But these settings often cannot finish the job of getting the person stable. So a link to ongoing care is essential [4].

TIP 45 is candid about the evidence. It says it is not yet known whether people do better in outpatient or inpatient detox [4]. It also says the final decision on placement rests with the treating physician [4]. The formal five-level ladder is set out on our heroin detox page.

For opioids, the setting also decides something else: where treatment medication can begin. TIP 63 notes, in passing, that outpatient settings are where most patients start treatment with medication [5]. Which setting fits one person is still the treating physician’s call [4].

Medications Used in Opioid Detox, and Starting Treatment Medication

Medication does two different jobs in opioid detox.

The first job is easing withdrawal. TIP 45, published in 2006, says this is most often done with methadone, with other medications added for nausea, vomiting, diarrhea and stomach cramps [3]. MedlinePlus adds buprenorphine, which can shorten detox, and clonidine, which eases symptoms such as anxiety, muscle aches and sweating but does not reduce cravings [2]. What each medication is for is set out on our heroin detox page.

The second job is treating opioid use disorder itself. TIP 63 names three FDA-approved medications: methadone, buprenorphine and naltrexone [5]. Methadone and buprenorphine reduce or remove withdrawal symptoms. All three blunt or block the effects of illicit opioids and reduce cravings [5]. Methadone and buprenorphine treatment have also been linked to a lower risk of overdose death [5].

That sets up the real choice in opioid detox. One path is to come off opioids completely. TIP 63 calls this medically supervised withdrawal, a process once called detoxification. A provider gives methadone or buprenorphine for a short time, then slowly reduces it until it stops [5]. TIP 63 cites studies showing that most people with opioid use disorder who take this path start using opioids again. Most also do not stay in the care that was recommended [5]. The other path is to start treatment medication and stay on it. TIP 63 says people who stop their medication generally return to illicit opioid use. It calls arbitrary time limits on this treatment inadvisable [5].

Naltrexone works differently. It requires a period without opioids first, so supervised withdrawal is needed before it can start [5]. MedlinePlus warns that it can bring on a sudden and severe withdrawal if opioids are still in the body [2].

Methadone has its own rules. TIP 63 describes a federal rule that methadone for opioid use disorder be provided through a certified opioid treatment program. There are a few narrow exceptions, such as hospital care for another condition [5]. So it is worth asking a program which medications it can start or continue on site.

MedlinePlus says people who go through withdrawal over and over should be treated with long-term methadone or buprenorphine maintenance [2]. Amounts and timing are prescribing decisions, and none appear on this page. Our pages on medication-assisted treatment and buprenorphine treatment explain how that care works over time.

The Overdose Risk After Opioid Detox

For opioids, the greatest danger often comes after detox ends, not during it.

MedlinePlus says the biggest complication is returning to use. Most opioid overdose deaths occur in people who have just detoxed. Withdrawal lowers a person’s tolerance. So someone who has just gone through it can overdose on a much smaller dose than they used to take [2]. TIP 63 says it in one line: patients who complete medically supervised withdrawal are at risk of opioid overdose [5]. TIP 45 says that people who move from opioid dependence to a drug-free or medication-free state are at greater risk of overdose if they return to opioid use [3].

If someone is having a seizure, is unresponsive or has trouble breathing, call 911. For a mental-health crisis call or text 988.

Know what an overdose looks like before discharge day. Our page on the signs of an opioid overdose lists them. Then treat the discharge plan as part of detox, not as an afterthought.

Why Detox Alone Is Not Treatment

TIP 45’s panel takes special care to say that detoxification is not substance abuse treatment and rehabilitation [1]. It agrees that a detox program is not designed to solve the long-standing mental, social and behavioral problems that come with drug use [1]. It also says that linking detox to treatment cuts down the “revolving door” of repeated withdrawals [1].

MedlinePlus puts it simply. Most people need long-term treatment after detox [2]. That can include self-help groups, outpatient counseling, intensive outpatient treatment and inpatient treatment [2]. It also says anyone going through opioid detox should be checked for depression and other mental illnesses. Treating them can lower the risk of relapse [2].

TIP 63 adds the part that is specific to opioids. Medication for opioid use disorder should be available in all settings and at all levels of care [5]. So detox and treatment medication are not a choice between two things. In TIP 63’s terms, a medication plan should be available at each step, from detox into inpatient rehab or an outpatient program.

Some people prefer to take those steps on one campus. The Recovery Village Columbus in Groveport, Ohio publishes medical detox, residential inpatient rehab, a partial hospitalization program, an intensive outpatient program, aftercare planning and inpatient mental health care. Admissions can tell you on the call which of those fits after detox, and which medication options it can offer.

What to Bring Up on the Admissions Call

A good admissions call is short and specific. It goes faster when you have these ready.

• Which opioids, and how recently. Name every one: a prescribed painkiller, heroin, fentanyl, methadone. Say so if a pill or powder may have contained something other than what it was sold as.
• Anything else in the picture. Mention alcohol, benzodiazepines or other sedatives. TIP 45 treats their withdrawal differently: unlike uncomplicated opioid withdrawal, alcohol and sedative withdrawal can be life-threatening [3]. Our benzodiazepine detox page explains that side.
• Any current prescription. If you already take methadone or buprenorphine, say which, and ask whether the program can continue it.
• Health history. Heart problems, pregnancy, past overdoses and mental health conditions all shape the plan.
• Which medication options the program can start. Ask whether it can begin methadone, buprenorphine or naltrexone, and what the plan looks like if you would rather not stay on a medication.
• The day detox ends. Ask where you go next, who prescribes any medication after discharge, and when that first appointment is.

Then ask about cost. Our own cost page puts detox at $250 to $800 a day. Those are our published ranges, not official figures, and what rehab costs lists the rest. What your plan pays depends on the plan, so run the insurance check before you arrive rather than after.

Be as accurate as you can about amounts and timing on the call. The plan is built from what you tell the team.

Frequently Asked Questions

Sources

1. Center for Substance Abuse Treatment. (2006). Detoxification and Substance Abuse Treatment, Chapter 1: Overview, Essential Concepts, and Definitions in Detoxification. Treatment Improvement Protocol (TIP) Series No. 45, SAMHSA. https://www.ncbi.nlm.nih.gov/books/NBK64119/
2. MedlinePlus, National Library of Medicine. (2026). Opiate and opioid withdrawal. MedlinePlus Medical Encyclopedia. https://medlineplus.gov/ency/article/000949.htm
3. Center for Substance Abuse Treatment. (2006). Detoxification and Substance Abuse Treatment, Chapter 4: Physical Detoxification Services for Withdrawal From Specific Substances. Treatment Improvement Protocol (TIP) Series No. 45, SAMHSA. https://www.ncbi.nlm.nih.gov/books/NBK64116/
4. Center for Substance Abuse Treatment. (2006). Detoxification and Substance Abuse Treatment, Chapter 2: Settings, Levels of Care, and Patient Placement. Treatment Improvement Protocol (TIP) Series No. 45, SAMHSA. https://www.ncbi.nlm.nih.gov/books/NBK64109/
5. Substance Abuse and Mental Health Services Administration. (2018). Medications for Opioid Use Disorder, Part 1: Introduction to Medications for Opioid Use Disorder Treatment. Treatment Improvement Protocol (TIP) Series No. 63. https://www.ncbi.nlm.nih.gov/books/NBK535270/

This page is for general information and is not medical advice. Only a licensed clinician who knows your history can tell you what is right for you. If you or someone you know is in immediate danger, call 911. For free, confidential support 24/7, call or text 988.

Author

Kevin Wandler, MD

Chief Medical Officer, The Recovery Village