Wanting to quit is good news; the risk is in how they stop. After heavy daily drinking or regular benzodiazepine use, stopping suddenly can cause seizures and delirium that can kill.12 Opioid and stimulant withdrawal carry different dangers. Get them in front of a doctor before they stop, so someone can check their risk and set a plan.
Is it safe to quit cold turkey?
It depends on what they’re stopping.
| Substance | Can stopping suddenly be dangerous? | Safer path |
|---|---|---|
| Alcohol (daily or heavy drinking) | Yes. Seizures and delirium tremens (DTs) can be fatal.1 | Medical assessment first; supervised withdrawal if risk is moderate or high1 |
| Benzodiazepines (Xanax, Klonopin, Ativan, Valium), prescribed or not | Yes. Stopping abruptly can cause life-threatening seizures.2 | A slow, prescriber-guided taper3 |
| Barbiturates, GHB | Yes. Barbiturate withdrawal can be deadly, and GHB withdrawal is complex.5 | Hospital-level care5 |
| Fentanyl mixed with medetomidine | It can be. Severe withdrawal may need emergency or intensive care.4 | Hospital or medically managed withdrawal4 |
| Opioids (heroin, fentanyl, pain pills) | It can be without proper care, mainly through dehydration and overdose after a return to use.5 | Buprenorphine or methadone5 |
| Stimulants (cocaine, meth) | Not usually physically, but depression and suicidal thoughts can follow.5 | Mental health support |
Can someone detox at home?
Sometimes, if a clinician has judged the risk to be low and set up a plan. That is called outpatient (or ambulatory) withdrawal management, and it’s a different thing from quitting alone.
For alcohol, the American Society of Addiction Medicine (ASAM) guideline calls for a check-in with a health professional every day for up to five days, some of which can be by phone or video. The person and whoever is with them should be taught what worsening withdrawal looks like. Someone with little support or an unsafe home may need a more intensive setting even if their medical risk is lower.1 Supplements, “home detox kits” and online programs that never examine your loved one can’t stand in for that assessment, which includes a history and physical exam.1
Who is at higher risk with alcohol?
ASAM lists these risk factors for severe or complicated withdrawal, and the more of them someone has, the higher the risk:1
- A past withdrawal seizure or DTs, the biggest warning sign
- Many past episodes of withdrawal
- Long periods of heavy, regular drinking
- Age over 65
- Other serious illness, especially a past brain injury
- Also depending on sedatives, or using other drugs
- Withdrawal symptoms that start while there is still alcohol in their blood
Seizures and DTs can show up anywhere from the first day to about five days after the last drink.1 Our alcohol withdrawal timeline walks through each stage.
Why are benzodiazepines different?
The body adapts to them even at prescribed doses. The FDA warns that dependence can develop within several days to weeks of steady use, and that stopping or cutting the dose too fast can cause life-threatening seizures.2 A 2025 ASAM-led guideline says anyone who has taken one for more than a month should taper gradually with a clinician,3 and a safe taper can take months.5 More on benzodiazepine withdrawal and tapering.
Is opioid withdrawal dangerous?
It’s miserable: muscle aches, sweating, runny nose, yawning, goosebumps, cramps, nausea, vomiting, diarrhea, anxiety and poor sleep. With heroin and other short-acting opioids it usually starts within 12 hours, peaks at 24 to 48 hours and lasts 3 to 5 days. Methadone withdrawal starts within about 30 hours and can last up to 10 days.5
The physical danger is mostly dehydration. Vomiting and diarrhea can throw off the body’s salt balance and heart rhythm, and the fast pulse and high blood pressure of withdrawal can strain a heart that already has problems.5
The bigger danger comes afterward. Withdrawal lowers tolerance, so using again carries a higher risk of overdose. Staying on methadone or buprenorphine eases withdrawal and lowers the risk of dying from an overdose.5 Ask any doctor or program about medication for opioid addiction, and keep naloxone in the house; here’s how to use it.
If your loved one is pregnant, they shouldn’t stop opioids without medical supervision. Quitting suddenly often leads to a return to use, which can harm both parent and baby, and methadone or buprenorphine with counseling is the recommended treatment.6
What is medetomidine withdrawal?
Medetomidine is a veterinary sedative that the CDC warned in April 2026 is turning up in the illegal drug supply, mostly mixed into fentanyl.4 People who stop after regular use can have high blood pressure, a racing heart, anxiety, tremor, chest pain, alertness that comes and goes, and vomiting that won’t stop. Some don’t improve with standard opioid withdrawal care.4 If your loved one uses street fentanyl, tell the medical team, because it changes what kind of setting they need.
Is stimulant withdrawal dangerous?
The body usually comes through it fine; the mood is what to watch. After heavy cocaine or meth use, people can feel anxious, agitated and low, crave the drug, and sleep for long stretches or not at all. Depression can be severe, and self-harm is the greatest risk in this stage.5 The low tends to last longer after high doses of meth than after cocaine.5
Stay close, and ask plainly: “Are you thinking about killing yourself?” If the answer worries you, call or text 988 together.
What do I say when they announce they’re quitting?
Be glad out loud first, then steer toward a doctor.
What to say instead
“Great, just stop. You don’t need a doctor.”
“I’m proud of you. Can we call your doctor in the morning so it goes safely?”
“Just cut your pills in half.”
“Let’s ask your prescriber how to come down slowly.”
“You got through it last time. You’ll be fine.”
“Last time was rough, and past withdrawals can make the next one worse. Let’s get checked first.”
What should we do before they stop?
Get a medical assessment within a day or two. Their primary care doctor, an urgent care clinic, an addiction medicine specialist or an ER can do it. Clinicians use a rating scale such as the CIWA-Ar, plus the risk factors above, to decide whether home is reasonable or they need 24-hour care.1 And plan past the first week: withdrawal management is a first step, not treatment, and treatment should start alongside it or right after.15 Our guide to how assessments decide the level of care covers that next decision.
Before they stop: bring this to the doctor
- What to tell the clinician
- What to ask
What if they’ve already stopped?
Call their doctor today and write down when they had their last drink or dose. For the next few days, stay with them or have someone check in often, and keep them in a calm, quiet room with plenty of non-caffeinated fluids.1 Don’t hand them anyone else’s pills or sleep aids to take the edge off.
If, after cutting back or stopping, they have any of these:
- A seizure
- Confusion, or they see or hear things that aren’t there1
- A high fever, drenching sweats, or a very fast or pounding heartbeat1
- Agitation or shaking you can’t calm1
- Chest pain or trouble breathing24
If they have a seizure, move hard objects out of the way, gently turn them onto their side, and put nothing in their mouth.7
Frequently asked questions
Can they taper their drinking down on their own?
It’s not something to work out alone. Clinicians manage alcohol withdrawal with monitoring and, when needed, prescribed medication such as benzodiazepines, carbamazepine or gabapentin.1
Will insurance pay for withdrawal management?
It depends on the plan. Call the behavioral health number on the insurance card, ask about “withdrawal management” or “detox” benefits, and ask whether prior approval is needed. Here’s what a benefits check can and can’t promise.
Sources
- American Society of Addiction Medicine — The ASAM Clinical Practice Guideline on Alcohol Withdrawal Management (2020). asam.org/docs/default-source/quality-science/the_asam_clinical_practic… — accessed Oct 2026
- FDA — FDA requiring Boxed Warning updated to improve safe use of benzodiazepine drug class, Drug Safety Communication (September 23, 2020). fda.gov/drugs/drug-safety-and-availability/fda-requiring-boxed-warning… — accessed Oct 2026
- American Society of Addiction Medicine — Joint Clinical Practice Guideline on Benzodiazepine Tapering (2025). asam.org/quality-care/clinical-guidelines/benzodiazepine-tapering — accessed Oct 2026
- CDC Health Alert Network — Medetomidine in the U.S. Illegal Fentanyl Supply Increasing Risk for Overdose and Severe Withdrawal Syndrome, HAN-00527 (April 2, 2026). cdc.gov/han/php/notices/han00527.html — accessed Oct 2026
- U.S. Department of Justice, Bureau of Justice Assistance and National Institute of Corrections, with ASAM — Guidelines for Managing Substance Withdrawal in Jails (June 2023). asam.org/docs/default-source/guidelines/guidelines_for_managing_substa… — accessed Oct 2026
- American College of Obstetricians and Gynecologists — Opioid Use Disorder and Pregnancy (patient FAQ). acog.org/womens-health/faqs/opioid-use-disorder-and-pregnancy — accessed Oct 2026
- CDC — First Aid for Seizures (May 2024). cdc.gov/epilepsy/first-aid-for-seizures/index.html — accessed Oct 2026