Heroin withdrawal peaks at 72 hours and resolves within two weeks.

Heroin withdrawal is the physiological process that begins within hours of stopping heroin use. Symptoms follow a predictable staged pattern from early discomfort through a delayed peak, a resolution phase, and a protracted period of psychological adjustment that can extend for weeks. Understanding the timeline in advance changes how a person experiences it. Most people who attempt withdrawal without support fail not because the symptoms are medically dangerous but because the intensity arrives later than expected and catches them unprepared.

Heroin is classified as a short-acting opioid, meaning the half-life is short and the body clears it faster than substances like methadone or extended-release prescription opioids. That fast clearance is why onset is swift, typically within 8 to 24 hours of the last dose. It is also why the acute phase is intense but relatively contained, resolving within seven to ten days for most people.

Unlike alcohol or benzodiazepine withdrawal, heroin withdrawal does not typically carry a risk of seizures or cardiac events. NIDA's heroin research documents that the primary medical risks are dehydration, cardiovascular stress, and relapse-related overdose rather than seizure. The danger is different: the psychological intensity of the peak phase, combined with the immediate certainty that using again will bring relief, is what drives most unsupported attempts to break down. Medically supervised detox addresses that window directly.

The early phase of heroin withdrawal begins within 8 to 24 hours of the last dose. In this window, symptoms are present but not overwhelming. Anxiety and restlessness appear first. Muscle aches follow, along with difficulty sleeping, a runny nose, excessive yawning, and mild sweating.

Many people describe this stage as feeling like the onset of a bad flu. The discomfort is real, but the intensity is low enough that it feels survivable without support. This early relief is misleading. At Jintara, the clinical team uses it as a teaching moment rather than a reason to step back.

Denise O'Leary, Clinical Director, explains the dynamic: a person arriving on opioids is often surprised to find the first couple of days are not as bad as they feared. Little do they know the harder phase is still coming. Setting that expectation honestly in those first 36 hours is part of the clinical work, so the person is prepared rather than blindsided.

Clients who arrive for detox during this early window attend their first week of treatment structure from the day they arrive. Therapy and detox run simultaneously at Jintara rather than sequentially, which means the clinical team is already building rapport and a treatment framework before the peak phase begins.

The peak phase of heroin withdrawal falls between hours 36 and 96 after the last dose. This is when the full symptom load arrives. Sweating and chills intensify, often alternating rapidly. Nausea, vomiting, and diarrhoea appear and create real dehydration risk. Muscle spasms and severe leg cramps are common. Anxiety is at its highest, and the craving to use is most acute precisely because using again would produce immediate, complete relief.

This is the phase that separates supervised detox from unsupported attempts. A person who felt manageable at hour 24 and confident at hour 30 can find themselves in severe distress at hour 60. Without a clinical team present and without a medication protocol already running, the gap between feeling able to manage and feeling unable to continue closes very quickly.

Goosebumps and raised body hair, the physical origin of the phrase cold turkey, are characteristic of this phase. Pupils are dilated. Heart rate and blood pressure may be elevated. The combination of physical misery and the certainty that one dose would end it is the clinical reality the team at Jintara plans for from the moment a client arrives, not from the moment symptoms intensify.

Dual diagnosis treatment is often relevant at this stage. People with underlying anxiety or depression frequently find the peak phase amplifies pre-existing symptoms, and the clinical team adjusts the medication and therapy plan accordingly.

By days five to seven, the acute physical symptoms of heroin withdrawal begin to ease for most people. Vomiting and diarrhoea typically stop. Muscle spasms reduce. The appetite begins to return. Energy remains low, but the most physically demanding phase is passing.

What continues beyond the acute phase is the psychological dimension. Mood is flat. Sleep is fragmented and unreliable, with vivid dreams being common. Fatigue is significant, partly physiological and partly the result of the physical effort of the preceding days. Cravings are present but less physically overwhelming than at the peak.

The Clinical Opiate Withdrawal Scale (COWS), the standard clinical tool for measuring opioid withdrawal severity, is used by the nursing team at Jintara throughout this progression. Scores are taken three times daily during the first three to four days when severity is highest, then twice daily, then once daily as the client stabilises. The COWS score drives medication adjustments in real time, which means the team is responding to where a client actually is rather than following a fixed protocol that ignores individual variation.

Aftercare planning begins formally during this resolution phase at Jintara. The clinical team starts building the written plan that the client will carry home before the acute phase is fully resolved, not after, because the window of motivation is most open when the consequences of withdrawal are still recent.

Post-acute withdrawal syndrome, sometimes called PAWS or protracted withdrawal, is the period of ongoing symptoms that extends beyond the acute phase. For heroin, this typically begins around days seven to ten and can continue for two to four weeks, sometimes longer depending on the duration and intensity of prior use.

PAWS symptoms are predominantly psychological rather than physical. Insomnia and disrupted sleep architecture persist. Low mood, sometimes meeting the clinical threshold for depression, is common. Concentration and short-term memory are impaired. Energy levels remain below baseline. Drug cravings return episodically, often triggered by stress or reminders of prior use, even when the person has felt well for days.

Denise O'Leary put it plainly in a clinical interview at Jintara: you are not done withdrawing until about three weeks after you get to zero. That window, the three weeks from the last dose to genuine neurological stabilisation, is where the therapy program at Jintara does its most important work. PAWS management is built into the weeks two to four schedule rather than treated as a separate or secondary concern.

The nursing team at Jintara, led by Lertkhwan Sukpia, tracks this protracted phase explicitly. The plan shifts from medication-heavy early-phase monitoring to structured psychological support and sleep management as the physiological symptoms reduce and the psychological work becomes the primary clinical focus.

The Clinical Opiate Withdrawal Scale (COWS) is the standardised clinical tool used to measure opioid withdrawal severity. It assesses eleven observable and self-reported signs including resting pulse rate, sweating, restlessness, pupil size, bone and joint aches, runny nose or tearing, gastrointestinal distress, tremor, yawning, anxiety and irritability, and gooseflesh. Each sign is scored on a graduated scale. The total COWS score determines the severity band and drives both monitoring frequency and medication decisions.

A COWS score above eight signals moderate withdrawal. Above seventeen signals severe withdrawal. The COWS clinical reference documents the full scoring criteria and validation data for the tool. The score is not static. It moves with the client's physiology, and the nursing team at Jintara scores it at structured intervals rather than estimating severity from a single reading.

Lertkhwan Sukpia describes the approach: in the first three to four days for clients with high opioid withdrawal scores, the team checks three times daily. As the score drops, the frequency reduces to twice daily, then once daily until the client is stable and regular monitoring is no longer necessary.

The practical effect of COWS-driven monitoring is that medication is calibrated to actual severity rather than to a predetermined schedule. If a client's score drops faster than expected, the taper accelerates. If it stays elevated, the team holds the dose and rescores before adjusting. See Jintara's admissions process for more on the initial assessment pathway.

The medications used in heroin detox at Jintara are chosen to reduce symptom severity and prevent the most dangerous complications of withdrawal, not to eliminate all discomfort or to substitute a new long-term dependency. The primary detox medication is a methadone taper.

Methadone is a long-acting opioid that binds to the same receptors as heroin but with a slower onset and a longer half-life. A structured taper uses progressively lower doses over the detox period to allow the nervous system to adjust gradually rather than abruptly. Darren Lockie, Founder of Jintara, notes that some clients, particularly those from the UK where methadone has a different cultural association, arrive with resistance to methadone. Almost without exception, those who attempt to proceed without it find within three to four days that a taper is the right clinical choice.

Standard comfort medications in medically supervised opioid detox may include clonidine for sweating and cardiovascular changes, anti-diarrhoeals for gastrointestinal symptoms, and targeted medications for acute anxiety, all prescribed under psychiatrist guidance rather than self-administered. All medications prescribed during the detox period are included within the standard program fee.

EMDR therapy, which Jintara's clinical team uses for trauma work, is relevant in the weeks after the acute detox phase when the psychological residue of long-term heroin use is being addressed. It is not used during acute withdrawal.