Categories: Medicine

How long does Adderall stay in your system?

How long does Adderall stay in your system depends on many factors, including age and weight?

Adderall is a combination of amphetamines and dextroamphetamine.

It belongs to the class of stimulants of the central nervous system.

Adderall is used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy.

Adderall works by effecting the levels of some natural chemical substances in the brain. It can assist you increase your attention span, focus, and control your behavioral problems.

If you take Adderall, you may be wondering how long does Adderall stay in your system?

How long it takes for a medicine to leave your body depends on your dose, age, metabolism and many other factors.

You can only understand the the time of drug in the blood stream with the concept of half life.

What is a Half-Life?

Half life is the total time required for a drug to reduce the plasma concentration in the body by 50%.

In other words, after a half-life, the amount of the drug in the body is half of the initial dose. It may sound complex, but it’s actually very simple.

How long does Adderall stay in your system?

The half-life of amphetamine depends on the isomer.

The half-life for l-amphetamine is reported to be of 11-14 hours.

The half-life For d-amphetamine is approximately 9-11 hours.

While The half-life of dextroamphetamine is 11 hours in teens aged 13 to 17 and 9 hours in children aged six to 12 and 10 hours in adults.

Here is how long does Adderall stay in your system?

Adderall has a half-life of 9 to 14 hours, which means that only half of the medicine remains in your body for 9 to 14 hours after administration. Adderall will completely drain your system in 3-4 days.

Adderall can be detected with the help of urine test, Hair testing, Saliva testing, and blood testing.

It will stay in your saliva for up to 72 hours.

The complementary urine test may show positive results about 2 to 4 days after ingestion.

Adderall may produce a peak plasma concentration approximately six hours after ingestion.

Hair tests also showed traces of Adderall one month after taking the dose. On average, Adderall moves away from the hair within 90 days.

Note: We make a hypothesis in medicine. It’s not accurate, but close enough. We say that the drug practically disappeared after 4-5 half-lives. If the drug has a half-life of 3 hours, it is almost used up 12 to 15 hours after the last dose. The effect of the drug may have disappeared, although some drugs are still in the blood.

What is the drug Adderall used for?

Adderall is the brand name of a prescription medication indicated for the treatment attention deficit hyperactivity disorder (ADHD) & narcolepsy.

Factors that Influence How Long Adderall Stays in Your System

A number of factors influence the length of time Adderall remains in your system. These factors include the following

  • Age
  • Body composition
  • Food in the system
  • PH levels
  • Metabolism
  • Organ function such as liver and kidney
  • Dosage amount
  • Frequency of use
  • Hydration levels
  • The person’s genetics


Adderall has a half-life of 9 to 14 hours. This means that only half of the medication stays in your body 9 to 14 hours after administration. Adderall will completely empty your system in 3-4 days.

Manzoor Ahmad

I am a professional pharmacist and a passionate copywriter having more than 5 years of experience in writing medical related topics.

Published by
Manzoor Ahmad

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