How Long Does Morphine Stay in Your Urine – (And Why)?

How Long Does Morphine Stay in Your Urine – (And Why)?

Exact Answer: 3 days

There are plenty of valid reasons why someone would need to take morphine. As a powerful painkiller, morphine is necessary after surgeries, injuries, and much more. Morphine is a powerful drug that helps many every single year. However, sometimes one also needs to know just how long morphine will stay in their system.

How Long Does Morphine Stay in Your Urine

How Long Does Morphine Stay In Your Urine?

Figuring out how long morphine will stay in your system is very basic, with base lengths of time being somewhat average across the board. Though there are some factors which may affect how long morphine stays in your urine, there is a normal average, such as:

  1. Urine: Morphine will be evident in one’s urine for an average of up to three days after the last dose.
  2. Blood: Morphine is evident in the blood for an average of up to 12 hours after the last dose.
  3. Hair: Morphine is evident in hair samples for an average of up to 90 days after the last dose.

There are a few factors that may affect how long morphine stays in your urine and your system in general. For instance, if you weigh more than a normal weight, you may hold more molecules of the drug in your fat stores, meaning you’ll likely hold onto the drug for one or two more days than average.

This means that an overweight person may hold morphine in their urine for about 4 or 5 days after the last dose. To remedy this, one will want to drink plenty of water and exercise. Doing so may help work the drug out of the system sooner.

To sum it up:

Evident InTime
UrineAbout 3 days
BloodAbout 12 hours
HairAbout 90 days

To factor in weight:

Weight Time
ObeseAbout 5-6 Days
OverweightAbout 4-5 Days
NormalAbout 3 Days

Why Does Morphine Stay That Long In Your Urine?

There are a few different things that may affect how long morphine will stay in your urine. However, morphine will stay in your system for the specified amounts of time due to the way in which your body metabolizes the drug. Stores of the drug are kept in body fat, allowing the molecules to slowly be released over time.

Because of this, it will take a few days for the drug to work its way out of the body. However, if you weigh less, the drug may be released quicker than average. One may also speed up the amount of time it takes morphine to leave their system by drinking more water and exercising more.

By drinking water and exercising, you’ll be allowing your body to flush the drug from your system faster than before. However, the standards will be the base average for most people.

If you’re concerned about the amount of time morphine will show in your system, you may want to consider taking a home drug test first before taking an actual test. This will give you a better idea of how long the drug will stay in your own body.

home drug test kits


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Hi! I'm Nidhi.

Here at the EHL, it's all about delicious, easy recipes for casual entertaining. So come and join me at the beach, relax and enjoy the food.


  1. It is concerning that some people would take morphine when the drug stays in your system for so long

  2. For someone who is prescribed morphine this article is incredibly informative. I can see how it could help someone in recovery or someone who is currently taking morphine.

    1. Yes, it is great to find an article that explains the effect of morphine in our system in such a clear way. It’s all about understanding what we are dealing with.

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