How Long Do Opioids Stay in Your System?

Opioid detection windows vary by specific drug and test type.

Detection Windows by Opioid (Urine)

• Heroin: 2–3 days
• Codeine: 2–4 days
• Morphine: 2–4 days
• Oxycodone: 3–4 days
• Hydrocodone: 3–4 days
• Fentanyl: 1–3 days
• Methadone: 3–14 days

Hair Testing

• All opioids: up to 90 days

Important Notes

• Poppy seeds can cause false positive for codeine/morphine
• Confirmatory GC-MS distinguishes heroin from prescription opioids
• Chronic use extends detection window