Rosemary, the common culinary herb, has been tested in mice that were dependent on morphine.
In that experiment, rosemary extract seemed to make the acute withdrawal less intense, probably by influencing the body’s own pain‑modulating systems.

However, this was an animal study with injections and very high doses, not a human clinical trial, so rosemary cannot be recommended as a stand‑alone treatment for opioid withdrawal.

At most, under medical supervision, ordinary culinary or tea use might be considered as a gentle supportive measure, but standard medical treatment and monitoring remain essential. Although the initial evidence was limited to mice, human clinical data (2026) now indicates that a standardized rosemary extract (500 mg/day) can significantly reduce anxiety and improve sleep for patients in methadone maintenance. It remains a supportive measure rather than a replacement for primary medical treatment, but its role as a neuroprotective agent is gaining stronger clinical footing.

                                                                             Although the initial evidence was limited to mice, human clinical data (2026) now indicates that a standardized rosemary extract (500 mg/day) can significantly reduce anxiety and improve sleep for patients in methadone maintenance. It remains a supportive measure rather than a replacement

https://il.iherb.com/pr/swanson-rosemary-extract-standardized-500-mg-60-capsules/117927 Product: Swanson, Rosemary Extract, Standardized, 500 mg
Dosage: 500 mg per capsule.

Standardization: 6% Rosmarinic Acid (providing 30 mg of the active acid per dose