How long do drugs stay in your system?

Medically reviewed by Drugs.com. Last updated on April 8, 2024.

What is a good list of the types of drugs and how long they stay in your system? This would depend on the types of test e.g. urine, blood, and hair tests.

Official answer

by Drugs.com

In general for those who want to find out how long drugs stay in your system the answer is not simple. Many factors influence how long a drug remains detectable

For example:

Amount and frequency of use
Metabolism
Weight
Age
General health
Drug tolerance
Hydration state

The following resources should help:

These links will give you time ranges based on upper and lower boundaries. They also explain types of tests used and provide good drug information.

How far back does a hair follicle test detect drugs?

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Vyvanse is not a narcotic. Vyvanse is a schedule C-II controlled substance because its ingredient, lisdexamfetamine dimesylate, is converted to dextroamphetamine (the active agent) in the body. Dextroamphetamine is also classified as a C-II drug. Continue reading

How long does Fentanyl stay in your system?

Traces of fentanyl can stay in your system for a lot longer than it takes for the effects of fentanyl to wear off. Drug testing can detect fentanyl or its metabolites (breakdown products) in urine for 24 to 72 hours, in blood for 5 to 48 hours, and in hair for up to 3 months, but it cannot be consistently detected in saliva. Continue reading

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