Detection windows · opioid
Opioids (opiates) detection windows
The federal panel's opiates assay targets morphine, codeine, and 6-acetylmorphine (a heroin-specific marker). Semi-synthetic opioids like oxycodone and hydrocodone are detected by separate, expanded panels and require additional analytes.
Last updated:How long is Opioids (opiates) detectable?
Detection windows for Opioids (opiates) vary by specimen, use pattern, and individual factors. As approximate ranges: urine commonly covers a few days (longer in chronic users), oral fluid covers hours to about 48 hours, blood covers hours, and hair offers up to ~90 days after a ~7–10 day incorporation delay. Full matrix below — and see the interactive Explorer for cross-substance comparisons.
| Specimen | Window | Pattern | Caveat |
|---|---|---|---|
| Urine | 1–3 days | occasional | Morphine/codeine typically clear within ~3 days. |
| 3–7 days | chronic | Detection extends with chronic use, particularly with semi-synthetics. | |
| Saliva | 1–48 hours | typical | Oral fluid window is short; useful for recent use detection. |
| Blood | 1–24 hours | typical | Plasma half-life is generally short. |
| Hair | 7–90 days | typical | ~7–10 day incorporation delay; hair is not federally approved. |
Ranges are approximate and vary by individual physiology, hydration, dose, frequency of use, and lab cutoff. They are not predictive of whether someone will "pass" a test.
About Opioids (opiates)
Opioids are a class of compounds — natural (morphine, codeine), semi-synthetic (oxycodone, hydrocodone), and synthetic (fentanyl, methadone) — that bind to opioid receptors. Standard "opiate" immunoassays primarily detect morphine and codeine; expanded assays add semi-synthetics; fentanyl and norfentanyl became part of the federal panel in 2025.
Key analytes / metabolites detected
- Morphine
- Codeine
- 6-acetylmorphine (heroin-specific)
- Hydromorphone
- Oxymorphone
Common cross-reactants (immunoassay-stage)
The following can affect screening immunoassay results and are typically resolved by mass-spectrometry confirmation and MRO review:
- Poppy seeds (ingestion, not cross-reactivity, but causes positive immunoassay)
- Quinolone antibiotics (rare)
- Rifampin (rare)
Appears in panels
Confirmation method
GC-MS or LC-MS/MS is the standard confirmation method for Opioids (opiates).
Sources & references
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