MDMA (ecstasy or molly) typically stays in your system for varying lengths of time depending on the type of drug test used and individual factors such as dose, metabolism, and frequency of use. Detection windows by test type:

• Blood: MDMA is generally detectable for about 1 to 3 days (24 to 71 hours) after ingestion, with a typical range around 1 to 2 days

• Saliva: Detectable for approximately 1 to 3 days (24 to 71 hours), often similar to blood detection times

• Urine: MDMA can be detected for up to 3 to 5 days after use, with some sources noting detection up to 7 days or longer in heavy or prolonged use

• Hair: MDMA can be detected in hair follicles for up to 90 days or more, depending on hair length and sample location

Pharmacokinetics:

• MDMA has a half-life of about 8 hours, meaning it takes roughly 8 hours for the concentration in the bloodstream to reduce by half.
• It generally takes about 5 half-lives (~40 hours) for 95% of the drug to be eliminated from the body

Factors influencing detection time:

• Dosage and frequency of use (higher or repeated doses prolong detection)
• Individual metabolism and health
• Purity of the drug
• Type and sensitivity of the drug test

In summary, MDMA is usually cleared from the bloodstream and saliva within 1 to 3 days, detectable in urine up to about 3 to 5 days, and can be found in hair samples for up to 3 months or longer