How Long Does Adderall Last? Adderall Dosages Explained

Adderall XR is taken orally, with or without food, once daily. The first dose is typically taken first thing in the morning; it should be taken at the same time each day for the best results.

How Long Does Adderall Last?

Adderall capsules should be swallowed whole with water or other liquids. If your child is unable to swallow the capsule, it can be opened and sprinkled over a spoonful of applesauce. Taken this way, the mixture should be swallowed whole without chewing, followed by a drink of water or other liquid. Capsules should never by crushed or chewed. As with all medications, follow your Adderall XR prescription instructions exactly.

Adderall capsules are available in the following dosages: 5mg, 10mg, 15mg, 20mg, 25mg and 30mg. The time-release formulation is designed to maintain a steady level of medication in your body throughout the day.

The optimal Adderall dosage varies patient by patient; is not determined by age, weight, or height, but rather by how a person metabolizes the medication. The following factors impact dosage:

  • How much of the medication is absorbed into the blood stream and across the blood-brain barrier
  • How much of the medication is absorbed into the blood stream from the intestines
  • How acidic the GI tract is — high acidity from fruit juices can keep amphetamine from being absorbed while low acidity from taking an antacid can accelerate absorption
  • How quickly the amphetamine is excrete in urine


Your doctor may adjust your daily dosage by 5mg increments until you or your child experiences the best response — that is, the lowest dosage at which you experience the greatest improvement in symptoms without side effects.

If you or your child exceeds the prescribed dosage, call your doctor or poison control, or seek emergency medical care.

Some patients report developing a tolerance to Adderall after long-term usage. If you notice that your dosage is no longer controlling your symptoms, talk to your doctor to plan a course of action.

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