How Long Does MDMA Stay in Your System? Testing and Detox Tips - Internal Medicine

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Hello Doctor...
Recently, a friend of mine returned from military service and, out of curiosity, took ecstasy (MDMA).
He will have to undergo a urine test soon.
How long does it take for the drug to be undetectable in urine? If he drinks a lot of water or milk, will it help dilute the drug in his system? I hope the doctor can respond quickly...
It would be best to reply to my email, as this type of question seems inappropriate to discuss publicly online...

aaa, 20~29 year old female. Ask Date: 2002/12/27

Dr. Yang Jun reply Internal Medicine


Hello: In response to your question, after taking ecstasy, residual substances can be detected for a long time as they are metabolized by the body.
Drinking more water or milk does not help in eliminating the toxins.
Therefore, the fundamental approach is to refuse and avoid taking ecstasy.

Reply Date: 2002/12/27

More Info


MDMA, commonly known as ecstasy or "molly," is a synthetic drug that alters mood and perception. It is known for its stimulant and empathogenic effects, making it popular in party and club scenes. However, understanding how long MDMA stays in your system is crucial, especially if there is a concern about drug testing.

MDMA can typically be detected in urine for about 1 to 3 days after use, although this can vary based on several factors, including the individual's metabolism, frequency of use, dosage, and overall health. In some cases, particularly with heavy or chronic use, MDMA may be detectable for a longer period, potentially up to a week or more. Blood tests can detect MDMA for a shorter duration, usually up to 24 hours, while hair follicle tests can identify the drug for up to 90 days after use.

Regarding your question about diluting the drug in the system, drinking excessive amounts of water or consuming dairy products like milk is not a reliable method to expedite the elimination of MDMA from the body. While staying hydrated is essential for overall health, particularly after using substances like MDMA, attempting to "flush" the drug out through excessive hydration can lead to water intoxication, which is dangerous and can result in serious health complications. The kidneys will filter the drug out naturally over time, and there is no scientifically proven method to significantly speed up this process.

If your friend is facing a urine test, the best course of action is to be honest about their substance use. Many employers and organizations have policies regarding drug use, and being upfront may be more beneficial than attempting to manipulate test results. Additionally, if your friend is struggling with substance use or has concerns about their health, it may be helpful for them to seek support from a healthcare professional or a substance use counselor.

In summary, MDMA can generally be detected in urine for 1 to 3 days, and while hydration is important, it does not effectively reduce the detection window. Encouraging your friend to be honest and seek help if needed is the best approach.

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