---
title: "How long does THC stay in my system?"
description: "THC metabolites can be detected in blood for hours to days after use depending on frequency. The impairing effect typically lasts 2 to 6 hours but the metabolite presence outlasts the impairment. A..."
url: https://riduiguy.com/faq-items/how-long-does-thc-stay-in-my-system/
date: 2026-05-23
modified: 2026-05-23
author: "The RI DUI Guy"
type: faq
lang: en
---

# How long does THC stay in my system?

THC metabolites can be detected in blood for hours to days after use depending on frequency. The impairing effect typically lasts 2 to 6 hours but the metabolite presence outlasts the impairment. A positive blood test alone does not prove impairment at the time of driving - that gap is a defense angle.

How long does THC stay in my system?(https://riduiguy.com/author/riduiguy/)2026-05-23T14:09:13-04:00