Post-acute withdrawal syndrome, often shortened to PAWS, is an informal term for lingering or recurring symptoms after the acute phase of substance withdrawal. SAMHSA more often uses the term protracted withdrawal and notes that there is no single agreed definition or symptom pattern across substances [1].
Sleep problems, anxiety, low mood, irritability, concentration difficulties, fatigue, and cravings can persist for weeks or months in some people, but not everyone experiences them, and similar symptoms can have other causes. If you are feeling worse months into sobriety, it is worth discussing the pattern with a clinician rather than assuming either that recovery is failing or that PAWS explains everything. Many people who start with medically supervised detox are surprised that recovery can continue to involve symptoms after the acute phase.
What Is Post Acute Withdrawal Syndrome?
Withdrawal is often discussed in terms of an acute phase and, for some people, lingering or recurring symptoms after the expected acute period. SAMHSA calls the latter protracted withdrawal and defines it as withdrawal symptoms that persist beyond the generally expected acute timeframe, along with other substance-related symptoms that may continue, evolve, or appear later [1]. Not everyone develops a distinct protracted phase, and the pattern varies by substance.
PAWS is the name many clinicians and people in recovery use for that second stage. It is not a formal diagnosis in the DSM, and SAMHSA noted that research on it is limited, especially for substances other than alcohol. The symptoms themselves are well described by people who have lived through them, and they respond to support. Cravings are often among them, and our post on how long do cravings last covers them in detail.
Common PAWS Symptoms
Protracted withdrawal can involve emotional, cognitive, sleep-related, and physical symptoms. The mix differs by substance, and SAMHSA emphasizes that the evidence is much stronger for some substances and symptoms than for others [1].
Emotional and Mental Symptoms
The SAMHSA advisory lists anxiety, irritability, low mood, and anhedonia, which is difficulty feeling pleasure from things that used to be enjoyable. It also lists problems with memory, concentration, and impulse control. Many people describe this as feeling flat, foggy, or short-tempered for no clear reason.
These symptoms can be confusing because they look like depression or an anxiety disorder, and sometimes they overlap with one. A clinician can help sort out what is part of withdrawal and what may need separate treatment. When irritability and rigid thinking are the main problem, the pattern sometimes called being sober but still miserable can point to emotional work that therapy addresses well.
Physical Symptoms and Sleep
Sleep disturbance is one of the better-documented protracted symptoms. After alcohol cessation, SAMHSA cites sleep studies showing problems such as difficulty falling asleep, reduced total sleep time, and sleep apnea that persisted well beyond acute withdrawal in some people [1]. Fatigue, low energy, pain, anxiety, and other symptoms can also continue depending on the substance. Poor sleep can make mood, concentration, and coping harder, but it should not automatically be assumed to be PAWS when other sleep or mental health conditions may be present.
How Long Does Post Acute Withdrawal Syndrome Last?
There is no fixed PAWS timeline, and acute withdrawal itself varies by substance and medication exposure. For heroin, MedlinePlus says withdrawal symptoms usually begin within about 12 hours of the last use [2]. NIDA reports that major heroin withdrawal symptoms typically peak within 24 to 48 hours and subside after about a week, although some people have persistent signs for months [3].
What follows is the longer stretch. The National Institute on Drug Abuse notes that heroin withdrawal generally subsides after about a week, while some signs can persist for months [3].
For alcohol, SAMHSA’s 2010 advisory says anecdotal literature and case studies have described some signs and symptoms lasting 2 years or longer, while a review of sleep studies found objective sleep abnormalities persisting for 1 to 3 years after alcohol cessation [1]. For benzodiazepines, it notes that protracted symptoms can wax and wane for months, while also stressing the difficulty of distinguishing withdrawal from rebound or the return of the condition the medication was treating [1].
Those longer durations describe what has been reported in some studies and case literature, not what every person should expect. The course of protracted withdrawal varies by substance and individual, and persistent symptoms should be reassessed when they are severe, worsening, or not following the expected pattern.
Why PAWS Raises the Risk of Relapse
The SAMHSA advisory warns that protracted withdrawal symptoms may lead people to seek relief by returning to substance use. That is the core danger of this stage. Feeling anxious, unable to sleep, and unable to enjoy anything is miserable, and the brain remembers what used to make those feelings go away.
Some people start looking for a different way to feel better, such as cannabis, and our chapter on being California sober looks at the risks of that path.
What Helps PAWS Pass
PAWS usually improves with time, and several things can make that time easier. None of them works overnight, and they often work better together than alone.
Daily Habits That Ease Symptoms
The SAMHSA advisory recommends addressing sleep problems directly and encouraging physical activity. In practice, that means a regular sleep and wake time, less caffeine late in the day, daily movement, and regular meals. Writing down symptoms each day can also show progress that is hard to feel in the moment.
Cravings are time-limited, but the exact duration varies. SAMHSA’s TIP 65 notes that most cravings in its coping-skills exercise last about 7 to 20 minutes and may rise and fall several times during that period [4]. The same guidance describes urge surfing, a mindfulness-based technique of noticing the sensations and thoughts that come with an urge without automatically acting on them [4].
Ordinary needs can also intensify discomfort. The HALT acronym, hungry, angry, lonely, tired, is a simple recovery self-check for whether a basic need is adding to stress or an urge. It can be useful as a prompt, but it is not a diagnosis or a complete explanation for cravings.
Treatment and Support
Counseling helps people name what they are feeling and practice coping skills. Mutual support groups, such as 12-step and SMART Recovery meetings, connect people with others who have been through the same stage.
Medication may also be part of treatment, but there is no single medication for PAWS as a whole. SAMHSA’s 2010 advisory notes that acamprosate may help some people with alcohol-related protracted symptoms and that methadone or buprenorphine can be appropriate for people with opioid use disorder who continue to struggle with withdrawal and relapse risk [1]. Medication choice should be based on the substance use disorder and the person’s overall clinical needs. Planning ahead for high-risk situations helps too, and our post on common relapse triggers covers the ones worth preparing for.
Frequently Asked Questions About PAWS
Is Post Acute Withdrawal Syndrome Real?
Protracted withdrawal is a real clinical phenomenon, but “PAWS” is not a formal DSM diagnosis, and there is no single agreed-upon syndrome that applies the same way to every substance. SAMHSA has described lingering or recurring symptoms after acute withdrawal and also notes important limits in the research [1]. The symptoms are worth taking seriously while also checking for other possible causes.
Can PAWS Symptoms Come Back After Months?
Some protracted withdrawal symptoms can fluctuate rather than improve in a straight line. SAMHSA specifically notes waxing and waning patterns with benzodiazepine protracted withdrawal and describes lingering symptoms after alcohol and opioid withdrawal [1]. If symptoms return after a period of improvement, do not assume the cause is PAWS; stress, sleep loss, a mental health condition, medication changes, or another medical issue may also need to be considered.
How Can I Tell PAWS From Depression?
PAWS and depression can overlap, and timing alone cannot reliably separate them. Low mood, sleep disruption, poor concentration, fatigue, and loss of pleasure may occur during protracted withdrawal, a depressive disorder, or both. A clinician can assess the pattern, severity, history, and other symptoms. If low mood is persistent, functioning is worsening, or you have thoughts of self-harm, seek professional help promptly or call or text 988.
Getting Through the Long Middle of Recovery
Protracted withdrawal can overlap with the broader work of emotional sobriety, but persistent symptoms should not automatically be attributed to PAWS. Sleep problems, anxiety, low mood, concentration difficulties, and cravings can have several causes, including co-occurring mental health or medical conditions. A useful plan combines symptom monitoring, treatment for the substance use disorder, attention to other conditions, and support that can be adjusted when the picture changes.
Early recovery can also bring changes in how someone uses time, money, food, work, exercise, gaming, gambling, or other substances. Sometimes a new behavior becomes compulsive or starts causing harm, but the informal labels “cross addiction” and “addiction transfer” should not be used to assume that every intense new habit is another addiction. The useful question is whether the behavior is difficult to control and is interfering with health, relationships, finances, work, or recovery. Our chapter on one habit replacing another looks at that pattern in more detail.
If you or someone you love is struggling months after stopping, support is available from counselors, doctors, and peers, and reaching out during this stage is a normal part of recovery that many people go through at some point. The SAMHSA National Helpline at 1-800-662-4357 is free and confidential, and anyone in crisis can call or text 988. When you are ready to talk about next steps, the team at Bright Paths Recovery can walk you through drug and alcohol detox and treatment in Los Angeles.
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you are in crisis, call or text 988.
Sources
- Substance Abuse and Mental Health Services Administration. Protracted Withdrawal. Substance Abuse Treatment Advisory, Volume 9, Issue 1, July 2010. https://library.samhsa.gov/sites/default/files/sma10-4554.pdf
- MedlinePlus. Opiate and opioid withdrawal. National Library of Medicine. https://medlineplus.gov/ency/article/000949.htm
- National Institute on Drug Abuse. What are the long-term effects of heroin use? https://nida.nih.gov/publications/research-reports/heroin/what-are-long-term-effects-heroin-use
- Substance Abuse and Mental Health Services Administration. TIP 65: Counseling Approaches to Promote Recovery From Problematic Substance Use and Related Issues, Exhibit 3.11, 2023. https://www.ncbi.nlm.nih.gov/books/NBK601490/
