Drug Detox: Withdrawal Symptoms, Timelines, and Treatment

If you or someone you love is ready to stop using drugs or alcohol, the first question is usually the same: What is actually going to happen to my body?

Withdrawal is real. For some substances, it can be dangerous. But with proper medical supervision, it’s manageable — and detox is how recovery begins. According to SAMHSA’s 2023 National Survey on Drug Use and Health, more than 95% of people who needed substance use treatment didn’t receive it — often because the process feels unknown and therefore frightening. This article explains what drug detox involves, what to expect during withdrawal for common substances, and how to find the right level of care.

What Is Drug Detox?

Drug detox — short for detoxification — is the process of clearing substances from the body while managing the physical and psychological symptoms that arise when someone who is dependent stops using. It is the first clinical step in addiction treatment, not a standalone solution.

When a person uses drugs or alcohol consistently over time, the brain and body adapt to their presence. Neurotransmitter systems recalibrate. Tolerance builds. The body comes to rely on the substance to maintain a baseline of normal function. When that substance is removed, the nervous system swings in the opposite direction — triggering the range of symptoms known as withdrawal.

The goal of medical detox is to stabilize the patient safely, reduce the severity of withdrawal symptoms, and prepare them for the next stage of treatment.

Why You Shouldn’t Detox Alone

Quitting certain substances without medical supervision isn’t just uncomfortable — it can be life-threatening.

Alcohol and benzodiazepines (such as Xanax or Valium) are the most dangerous substances to withdraw from without professional oversight. Both act on GABA receptors in the brain. When someone who is heavily dependent stops abruptly, the nervous system can enter a state of severe excitation — triggering seizures, hallucinations, and in the most serious cases, a condition called delirium tremens (DTs).

Delirium tremens typically develops 48–72 hours after the last drink and can include confusion, fever, rapid heart rate, and seizures. Without treatment, it can be fatal.

Other withdrawal syndromes — including opioid and stimulant withdrawal — are rarely life-threatening but are intensely uncomfortable and are the leading driver of relapse in early recovery. The physical and psychological distress makes continuing to use feel like the only option. That is why structured, medically supervised detox exists.

Symptoms that can occur during withdrawal include:

• Anxiety and agitation
• Nausea and vomiting
• Sweating and chills
• Muscle aches and cramping
• Insomnia
• Hallucinations (alcohol, benzodiazepines)
• Seizures (alcohol, benzodiazepines)
• Delirium tremens (alcohol)
• Intense cravings
• Depression and dysphoria (stimulants, opioids)

The severity of symptoms depends on which substance was used, how long and how heavily it was used, individual health factors, and whether multiple substances were involved.

Withdrawal Timelines by Substance

Withdrawal doesn’t follow one universal timeline. Each substance has its own onset, peak, and resolution window. The table below reflects general timelines for common substances; individual experiences vary significantly.

Substance	Onset of Withdrawal	Peak Symptoms	Duration
Alcohol	6–12 hours after last drink	24–72 hours	5–10 days; DTs possible 48–72 hrs
Opioids (heroin, prescription painkillers)	12–24 hours after last dose	72 hours	4–10 days
Fentanyl	8–24 hours	36–72 hours	5–10 days; may be prolonged
Benzodiazepines (Xanax, Valium)	1–4 days after last dose	Days 4–7	2–6 weeks; requires gradual taper
Stimulants (cocaine, methamphetamine)	Hours after last use	Days 1–3	1–2 weeks; psychological symptoms may persist

Note on benzodiazepines: Because benzo withdrawal carries a high risk of seizures, it is never managed through abrupt cessation. Medical detox uses a slow tapering protocol — often substituting a longer-acting benzodiazepine — to safely reduce dependence over days or weeks.

Note on fentanyl: Onset for illicitly manufactured fentanyl (IMF) — the dominant form in the current overdose crisis — may begin within 4–8 hours due to its shorter half-life. Pharmaceutical fentanyl (e.g., transdermal patches) follows a longer onset window. Timelines vary significantly by formulation.

What Happens at a Medical Detox Center?

Medical detox programs follow a structured three-phase process, though the details are individualized to each patient’s history and needs.

Evaluation

On arrival, the clinical team completes a thorough assessment: medical history, substance use history, current medications, mental health history, and bloodwork. This information shapes the entire treatment plan — which medications will be used, at what doses, and whether co-occurring conditions like depression, anxiety, or PTSD need to be addressed alongside withdrawal.

At Discover Recovery, we also assess for co-occurring disorders at intake, because unaddressed mental health conditions are one of the most common drivers of relapse after detox.

Stabilization

This is the active phase of detox. The clinical team prescribes medications to reduce the intensity of withdrawal symptoms, prevent dangerous complications, and manage cravings. Patients are monitored around the clock. At Discover Recovery, nursing staff provide 24/7 supervision so that any medical complications — changes in vitals, seizure risk, severe agitation — are caught and addressed immediately.

Transition to Treatment

Detox addresses physical dependence. It does not treat addiction. The final step in detox is preparing the patient for what comes next: residential treatment, partial hospitalization (PHP), or intensive outpatient programming (IOP). Patients who move directly from detox into a structured treatment program have significantly better long-term outcomes than those who leave after detox alone.

At Discover Recovery, many patients complete medical detox and transition into our residential treatment program — a 30+ day inpatient program that addresses the behavioral, emotional, and relational dimensions of addiction.

What Medications Are Used During Detox?

Medications used in detox vary by substance. The goal is not to substitute one dependency for another — it’s to stabilize the nervous system, reduce the severity of withdrawal, and make the detox process safe enough to complete.

For alcohol and benzodiazepine withdrawal:

• Benzodiazepines (diazepam, lorazepam, chlordiazepoxide) — first-line treatment for preventing alcohol withdrawal seizures and DTs. Administered under close supervision and tapered as symptoms resolve.
• Clonidine — helps reduce anxiety, sweating, elevated heart rate, and agitation.

For opioid withdrawal:

• Buprenorphine (Suboxone and related formulations) — a partial opioid agonist that significantly reduces withdrawal symptoms and cravings without producing the same level of euphoria as full opioids. A cornerstone of medication-assisted treatment (MAT).
• Methadone — used for opioid withdrawal management and longer-term maintenance, particularly for dependence on longer-acting opioids.
• Lofexidine / Clonidine — non-opioid options that address physical symptoms like sweating, muscle aches, and agitation.

For a deeper look at how opioid dependence develops and what treatment involves, see our opioid addiction treatment page.

Supportive medications (used across substance types):

• Anti-nausea medications (ondansetron, promethazine)
• Sleep aids
• Muscle relaxants
• Nutritional supplementation

Medication decisions are made by the treating physician based on the individual’s clinical picture — not a one-size-fits-all formula.

Medical Detox vs. Outpatient Detox: Which Is Right?

Not everyone requires inpatient detox. But for a significant portion of people withdrawing from substances, outpatient or home-based detox carries real risks.

Inpatient medical detox is strongly recommended when:

• The substance is alcohol or benzodiazepines (seizure risk)
• The person has a history of severe withdrawal or prior seizures
• There are significant co-occurring medical or psychiatric conditions
• Multiple substances are involved
• Previous outpatient detox attempts were unsuccessful
• There is no safe, stable home environment for recovery

Outpatient detox may be appropriate when:

• The substance carries lower physiological risk (some stimulants, cannabis)
• The level of physical dependence is mild-to-moderate
• The person has strong social support and a stable living environment
• A qualified outpatient prescriber can monitor the process closely

When in doubt, a more supervised level of care is always the safer choice. The risks of underestimating withdrawal severity are greater than the inconvenience of inpatient care.

What Is Post-Acute Withdrawal Syndrome (PAWS)?

For many people, the physical symptoms of withdrawal resolve within days to weeks. But a second phase — Post-Acute Withdrawal Syndrome (PAWS) — can follow, lasting months or even years.

PAWS involves neurological and psychological symptoms that persist long after the substance has cleared the body. It reflects the brain’s slower process of returning to normal function after prolonged substance use.

Common PAWS symptoms include:

• Mood swings and irritability
• Anxiety and depression
• Sleep disturbances (insomnia or hypersomnia)
• Difficulty concentrating or “brain fog”
• Low motivation and anhedonia (difficulty feeling pleasure)
• Cravings that emerge intermittently, sometimes triggered by stress or environmental cues

PAWS is one of the most common — and least discussed — causes of relapse in long-term recovery. Understanding that these symptoms are neurological, not character flaws, is an important part of staying in recovery through the difficult months after detox.

Ongoing treatment, therapy, and peer support are the most effective tools for managing PAWS. This is another reason why detox alone is never sufficient — recovery requires a sustained continuum of care.

Detox During Pregnancy

Substance use during pregnancy carries serious risks for both the mother and the developing fetus. Equally important: unsupervised withdrawal from drugs or alcohol during pregnancy can cause significant fetal stress and increase the risk of preterm labor, stillbirth, and complications depending on the substance.

Pregnant women should never attempt to stop using substances abruptly without medical guidance. The risks of supervised detox are far lower than the risks of continued use or unmanaged withdrawal.

Opioid and alcohol withdrawal during pregnancy carry the highest risk to the fetus. Physicians generally use medication-assisted approaches to stabilize the mother gradually — often with buprenorphine for opioid dependence — rather than pursuing rapid detox. Other effects of unsupervised withdrawal can include neonatal abstinence syndrome (NAS), low birth weight, premature birth, and neurological effects on the newborn.

Residential treatment is recommended during pregnancy to provide round-the-clock support, nutritional care, and medical monitoring for both mother and child.

How Long Does Detox Take?

Medical detox programs at Discover Recovery typically last approximately one week for most substances. Alcohol and opioid detox generally resolve within 5–10 days. Benzodiazepine detox is the exception — it requires a 2–6 week tapering process and cannot be safely rushed. Individual factors like severity of dependence, overall health, and polysubstance use all affect the timeline.

What Comes After Detox?

Completing detox is the hardest part of starting over. It is also just the beginning.

Detox addresses the physical side of dependence — it does not resolve the underlying patterns, trauma, or behavioral habits that drive addiction. According to the National Institute on Drug Abuse (NIDA), patients who continue into structured treatment after detox have significantly better long-term recovery outcomes than those who leave following detox alone.

After completing medical detox at Discover Recovery, patients can transition into:

• Residential treatment — 30+ days of inpatient care including individual therapy, group therapy, CBT, DBT, trauma work, and family programming
• Partial Hospitalization (PHP) — intensive day programming for patients who have completed residential or who have a stable living situation
• Intensive Outpatient (IOP) — structured treatment several days per week, allowing patients to return home each evening

Our clinical team helps each patient identify the right level of care for where they are in recovery — and transition between levels as they progress.

Frequently Asked Questions About Drug Detox

What is the difference between detox and rehab? Detox manages the physical process of withdrawal — clearing the substance from the body while keeping the patient safe. Rehab addresses the psychological, behavioral, and relational aspects of addiction through therapy, counseling, and skills-building. Detox typically precedes rehab as the first clinical step.

Is drug detox dangerous? It depends on the substance. Alcohol and benzodiazepine detox can be life-threatening without medical supervision due to the risk of seizures and delirium tremens. Opioid and stimulant withdrawal, while intensely uncomfortable, are generally not life-threatening with proper support. Medical supervision is always the safest approach.

Can I detox at home? Home detox is risky and not recommended for most people with substance dependence. For alcohol and benzodiazepines, it can be fatal. Even for substances with lower physiological risk, the intensity of withdrawal is a leading cause of relapse — and relapse following a period of abstinence increases overdose risk because tolerance has dropped. Medical detox provides a safer, more comfortable, and more effective start to recovery.

What is PAWS? Post-Acute Withdrawal Syndrome (PAWS) refers to neurological and psychological symptoms — mood swings, anxiety, sleep disruption, cravings, difficulty concentrating — that can persist for months or years after acute withdrawal resolves. PAWS is common and manageable, but requires sustained support and treatment.

Does insurance cover drug detox? Most private insurance plans cover some level of substance use treatment, including medical detox. The Mental Health Parity and Addiction Equity Act requires that insurance coverage for substance use disorders be comparable to coverage for medical and surgical care. Note that Discover Recovery accepts private insurance only — we do not accept Medicaid, Medicare, or state-funded plans. If you’re unsure whether your coverage qualifies, our team can verify your benefits in minutes.

What medications are used in drug detox? Medications vary by substance. Benzodiazepines are commonly used for alcohol withdrawal; buprenorphine or methadone for opioid withdrawal; supportive medications (anti-nausea, sleep aids, clonidine) are used across substance types. All medication decisions are made by the treating physician based on the patient’s clinical history.

How do I know if someone needs medical detox? If the substance is alcohol, benzodiazepines, or opioids — or if the person has a history of seizures during withdrawal, significant co-occurring health conditions, or multiple prior relapse attempts — inpatient medical detox is strongly recommended. When in doubt, err toward higher supervision.

Getting Help for Detox in Washington and Oregon

Withdrawal is not something you have to face alone, and it’s not something to attempt without support. At Discover Recovery, our clinical team — led by physicians specializing in addiction medicine — provides round-the-clock medical supervision, evidence-based medications, and compassionate care throughout the detox process.

We serve patients from across Washington and Oregon at our locations in Long Beach, WA, Camas, WA, and Portland, OR. Our full continuum of care means you won’t have to find a new provider as you step down from detox into residential treatment and beyond.

If you or someone you love is ready to take the first step, call us at 866.719.2173 or verify your insurance online. A conversation is free, and insurance often covers more than people expect.