Key Takeaways:
- Opioid withdrawal is a predictable physical and emotional response to stopping opioid use. Symptoms typically begin within 8–24 hours for short-acting opioids, peak around 72 hours, and usually improve within 4–10 days, though some people experience longer-lasting symptoms.
- Withdrawal can be extremely uncomfortable, but medical detox makes the process safer and more manageable.Professional care provides 24/7 monitoring, symptom support, hydration, and medications that reduce withdrawal severity.
- Medication-assisted treatment (MAT) helps reduce cravings and withdrawal symptoms. FDA-approved medications such as buprenorphine, methadone, and naltrexone support recovery by addressing the physical aspects of opioid use disorder alongside counseling and therapy.
- Humana typically covers medically necessary opioid addiction treatment. Coverage may include detox, residential care, outpatient programs, and MAT, though specific benefits vary based on the individual insurance plan.
Understand What to Expect During Opioid Withdrawal and Explore Available Support
Question:
What Happens During Opioid Withdrawal, and How Can Medical Detox and Treatment Support Recovery?
Answer:
Opioid withdrawal occurs when the body reacts to the sudden reduction or removal of opioids after developing physical dependence. While withdrawal is rarely life-threatening, symptoms can be intense and include nausea, muscle aches, sweating, insomnia, anxiety, depression, and strong cravings. The timeline depends on the type of opioid used, with short-acting opioids often causing symptoms within 8–24 hours and peaking around 72 hours. Medical detox provides a safer way to manage withdrawal through 24/7 supervision, comfort medications, and FDA-approved treatments like buprenorphine, methadone, and naltrexone. These medications help reduce cravings and withdrawal symptoms while allowing individuals to focus on recovery. Because relapse after withdrawal can significantly increase overdose risk, professional support is strongly recommended. Humana generally covers medically necessary opioid treatment services, including detox and medication-assisted treatment, depending on plan details and clinical needs.
Deciding to stop using opioids is one of the most courageous choices a person can make. But for many people, the fear of withdrawal is what keeps them from taking that first step. The cramping, the sleeplessness, the cravings — the body’s reaction to opioid cessation is real, and it can feel overwhelming before it even begins.
Understanding what opioid withdrawal actually involves can ease some of that fear. Not by minimizing how hard it is, but by replacing the unknown with clear, honest information. Knowing what to expect — and knowing that medical support can significantly reduce your discomfort — can make the difference between attempting recovery and staying stuck.
This post covers what causes opioid withdrawal, what the timeline looks like, which symptoms are most common, and why medically supervised detox is the safest path forward. It also explains how medication-assisted treatment (MAT) eases the process, and how Humana insurance can help cover the cost of professional care.
If you or someone you love is ready to explore treatment options, Royal Life Centers’ admissions team is available 24/7 and can answer your questions without pressure or obligation.
What Causes Opioid Withdrawal?
Opioids — whether prescription medications like oxycodone and hydrocodone, or illicit substances like heroin or illicitly manufactured fentanyl — work by binding to receptors in the brain and nervous system. When they attach to these receptors, they block pain signals and trigger a release of dopamine, producing feelings of relief or euphoria.
With repeated use, the brain adapts. It begins to rely on opioids to regulate basic functions like mood, heart rate, and sleep. Over time, the nervous system recalibrates itself around the presence of opioids — and when the drug is removed or reduced, the body doesn’t know how to function without it. That imbalance is what produces withdrawal.
According to the National Institutes of Health, opioid use disorder affects approximately 3 million Americans and 16 million people worldwide. As the NIH notes, opioid use disorder is a chronic disease — comparable to asthma or heart disease — that requires ongoing management, not willpower alone. The physical dependence that drives withdrawal can develop even in people who follow their prescriptions exactly as directed.
This matters because withdrawal is not a sign of weakness or moral failure. It is a predictable physiological response to the removal of a substance the body has learned to depend on.
What Does the Opioid Withdrawal Timeline Look Like?
The opioid withdrawal timeline depends primarily on which type of opioid was being used. Short-acting and long-acting opioids have meaningfully different withdrawal patterns.
Short-acting opioids (heroin, oxycodone, hydrocodone)
According to the World Health Organization’s Clinical Guidelines for Withdrawal Management and Treatment of Drug Dependence, withdrawal symptoms from short-acting opioids typically begin 8–24 hours after the last use and last 4–10 days. Royal Life Centers notes that symptoms commonly peak around the 72-hour mark — the most physically intense period of the process.
Long-acting opioids (methadone, extended-release morphine)
For long-acting opioids, onset is slower. Symptoms may not appear for 12–48 hours after the last dose, and withdrawal can persist for 10–20 days.
The full picture: acute withdrawal and PAWS
The acute phase of withdrawal — the most physically uncomfortable stage — typically resolves within a week. However, some people experience what is called Post-Acute Withdrawal Syndrome (PAWS). PAWS can include persistent anxiety, dysphoria, insomnia, irritability, and cravings, and may last for up to several months following detox.
This is why medical detox alone is rarely sufficient for lasting recovery. A structured treatment program that follows detox — including therapy, peer support, and relapse prevention — provides the foundation that makes sobriety sustainable.
What Are the Most Common Opioid Withdrawal Symptoms?
Opioid withdrawal has been described as a severe, full-body flu. That analogy captures the physical intensity, but withdrawal also carries significant psychological weight that a flu does not.
Physical symptoms include:
- Nausea, vomiting, and diarrhea
- Muscle cramps, aches, and tremors
- Sweating, chills, and goosebumps
- Runny nose and watery eyes
- Rapid heart rate and elevated blood pressure
- Dilated pupils
- Excessive yawning
- Insomnia
Psychological symptoms include:
- Anxiety and agitation
- Depression and low mood
- Restlessness
- Severe cravings
- Irritability
The severity of these symptoms varies from person to person. Factors that influence intensity include the duration of opioid use, the average dose, the specific opioid involved, and individual health history. Someone who has been using high doses of fentanyl for several years will generally experience a more intense withdrawal than someone who has been using lower doses of a short-acting prescription opioid for a shorter period.
Withdrawal symptoms can range from mild to severe. The World Health Organization’s Short Opioid Withdrawal Scale (SOWS) classifies opioid withdrawal in three tiers: mild (score 0–10), moderate (score 10–20), and severe (score 20–30). Moderate and severe withdrawal benefit most from clinical intervention and FDA-approved medications.
Why Is Medical Detox Safer Than Quitting Cold Turkey?
Opioid withdrawal is rarely life-threatening in itself — but attempting to stop without medical support carries real risks that are easy to underestimate.
Dehydration and physical complications. Repeated vomiting and diarrhea can cause significant dehydration, especially without access to IV fluids or clinical monitoring. For people with underlying health conditions, dehydration can quickly escalate into a medical emergency.
Relapse and overdose risk. This is the most serious risk of unmanaged withdrawal. After a period of abstinence, a person’s opioid tolerance drops significantly. Someone who relapses during or after withdrawal and uses the same dose they were previously accustomed to faces a dramatically elevated risk of overdose. As the WHO notes, all opioid-dependent people who have withdrawn from opioids should be advised that they face increased overdose risk and must use a much smaller amount if they relapse. In a supervised medical setting, clinical staff can intervene immediately.
Psychological distress. The anxiety, depression, and severe cravings that accompany withdrawal can be overwhelming without support. These psychological symptoms are among the most common reasons people return to opioid use before detox is complete.
What medical detox provides:
- 24/7 nursing supervision and monitoring
- FDA-approved medications to reduce symptom severity
- IV fluids and nutritional support
- Medications for nausea, pain, and sleep disruption
- Access to mental health support throughout the process
At Royal Life Centers, the medical detox program runs 4–8 days, with nursing staff available around the clock. Individual and group therapy begin during detox — not after — so that guests start building the psychological tools they’ll need for recovery from day one.
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How Does Medication-Assisted Treatment Ease Opioid Withdrawal?
Medication-assisted treatment (MAT) combines FDA-approved medications with counseling and behavioral therapies to address both the physical and psychological dimensions of opioid use disorder. According to the FDA, the three medications approved for opioid use disorder treatment are buprenorphine, methadone, and naltrexone — all of which are demonstrated to be safe and effective.
Each medication works differently:
Buprenorphine (including Suboxone and Sublocade) is a partial opioid agonist. It activates opioid receptors enough to reduce withdrawal symptoms and cravings without producing the same euphoric effects as full agonists. The WHO identifies buprenorphine as the best opioid medication for managing moderate to severe withdrawal. Crucially, buprenorphine should be administered only after withdrawal symptoms have begun — typically at least eight hours after the last heroin use — to avoid precipitated withdrawal.
Methadone is a long-acting full opioid agonist. It alleviates withdrawal symptoms and reduces cravings, and is particularly useful for people withdrawing from longer-acting opioids. It is dispensed through certified opioid treatment programs and requires daily attendance during the stabilization period.
Naltrexone (including Vivitrol, the extended-release injectable form) works differently from the other two. Rather than activating opioid receptors, it blocks them entirely — preventing opioids from producing any effect. Naltrexone is not used during active withdrawal; it is introduced after detox is complete to reduce the risk of relapse.
Beyond these primary medications, Royal Life Centers’ MAT program also uses clonidine (to reduce cardiovascular symptoms like elevated blood pressure and heart rate), along with comfort medications including anti-nausea agents, non-addictive sleep supplements, and NSAIDs for pain.
MAT is not a replacement for recovery. It is a clinical tool that reduces the suffering of withdrawal enough that people can engage fully in therapy, develop coping skills, and build the relapse prevention strategies that support long-term sobriety. Royal Life Centers integrates MAT with individual therapy, group therapy, and psychoeducation throughout the continuum of care — from medical detox through outpatient programming.
Does Humana Cover Medical Detox and MAT for Opioid Withdrawal?
For people with Humana insurance, the financial picture is often better than expected.
Under the Affordable Care Act (ACA), substance use disorder treatment is classified as an essential health benefit. This means all ACA-compliant Humana plans are legally required to include some level of coverage for opioid treatment. The Mental Health Parity and Addiction Equity Act (MHPAEA) adds another layer of protection — prohibiting Humana from applying stricter limitations to addiction treatment than it applies to comparable medical or surgical care.
In practical terms, Humana typically covers the full continuum of opioid addiction treatment, including:
- Medical detox (inpatient and outpatient)
- Residential inpatient rehabilitation
- Partial Hospitalization Programs (PHP)
- Intensive Outpatient Programs (IOP)
- Standard outpatient counseling and therapy
- Medication-assisted treatment, including FDA-approved opioid use disorder medications
One significant milestone: Humana eliminated prior authorization requirements for buprenorphine in 2017, removing one of the most common access barriers to MAT. Naltrexone (including Vivitrol) and methadone through certified opioid treatment programs are also commonly covered.
Coverage details vary by plan type — commercial/ACA marketplace, Medicare Advantage, and HMO plans each have different cost-sharing structures and network requirements. As a Joint Commission–accredited provider, Royal Life Centers works with Humana at its facilities in Washington State and Arizona. For a detailed breakdown of how different Humana plans cover opioid treatment, visit the Rehabs That Take Humana guide.
A note on insurance details: the coverage information above is educational and intended to help you understand general Humana policies. It is not a guarantee of benefits. Always verify your specific Humana plan before beginning treatment — Royal Life Centers can do this for you at no cost.
The Next Step Doesn’t Have to Be a Big Leap
Opioid withdrawal is hard. That is simply true. But it is also time-limited, medically manageable, and — for the vast majority of people — something that can be navigated safely with the right clinical support.
Understanding the timeline, the symptoms, and the treatment options available is a meaningful first step. The next one is learning more about what a full continuum of care actually looks like, and what recovery from opioid addiction can offer beyond detox. Explore Royal Life Centers’ addiction treatment programs to see the full range of options, or visit the opioid addiction treatment page for a deeper look at what treatment involves.
If cost is a concern, the rehab financing overview walks through payment plans, scholarship programs, and insurance options that may be available.
Recovery is possible. Help is available. Because We Care.
Frequently Asked Questions
How long does opioid withdrawal last?
For short-acting opioids like heroin or oxycodone, acute withdrawal symptoms typically begin 8–24 hours after the last dose and last 4–10 days, according to the World Health Organization. Symptoms from long-acting opioids, such as methadone, may not appear for 12–48 hours and can persist for 10–20 days. Some people also experience Post-Acute Withdrawal Syndrome (PAWS), which can cause lingering anxiety, insomnia, and cravings for up to several months after detox.
What are the most common symptoms of opioid withdrawal?
Opioid withdrawal symptoms affect both the body and the mind. Physical symptoms commonly include nausea, vomiting, diarrhea, muscle cramps, sweating, chills, runny nose, rapid heart rate, and insomnia. Psychological symptoms include intense anxiety, agitation, depression, restlessness, and severe drug cravings. Severity depends on factors like the specific opioid used, duration of use, average dose, and individual health history.
Does Humana cover medical detox for opioid withdrawal?
Yes — most Humana plans cover medically necessary detoxification for opioid withdrawal, including medication-assisted treatment with FDA-approved medications like buprenorphine, methadone, and naltrexone. Coverage is mandated under the Affordable Care Act and reinforced by the Mental Health Parity and Addiction Equity Act. Because benefit details vary by plan type, verifying your specific coverage before admission is important. Royal Life Centers can verify your Humana benefits for free in about five minutes — call 877-RECOVERY or submit the insurance verification form.
Is opioid withdrawal dangerous or life-threatening?
Opioid withdrawal itself is rarely life-threatening, but attempting to stop without medical supervision carries real risks. Severe dehydration from vomiting and diarrhea can become medically serious, particularly for people with underlying health conditions. The more significant danger is relapse: opioid tolerance drops quickly during abstinence, and using the same dose after a period of withdrawal substantially increases the risk of overdose. Medically supervised detox provides 24/7 monitoring, clinical intervention when needed, and a safer environment to complete withdrawal.
