How long does opioid detox take?

Opioid detox generally lasts between 5 and 10 days for the acute phase, with symptom onset, peak, and resolution varying depending on whether the opioid used is short-acting or long-acting. The timeline reflects both the pharmacokinetics of the substance and the degree of physiological dependence.

For short-acting opioids such as heroin, symptoms often begin within 6 to 12 hours after the last use. Rapid clearance leads to earlier onset of withdrawal and a relatively condensed symptom course. This early phase is characterized by increasing discomfort and autonomic activation.

Peak intensity for short-acting opioids typically occurs around 48 to 72 hours. During this time, symptoms such as muscle aches, gastrointestinal distress, and agitation are most pronounced. The peak corresponds to maximal disruption of opioid receptor signaling.

Long-acting opioids, such as methadone, produce a delayed onset of withdrawal, often beginning 24 to 48 hours after cessation. The withdrawal period is also more prolonged, sometimes extending beyond one week. This reflects slower elimination and sustained receptor occupancy.

Although acute symptoms generally resolve within days, some individuals experience persistent symptoms such as sleep disturbance or mood changes. These effects represent ongoing neurobiological adjustment following cessation.