What is the maximum safe dosage of Adderall?

The maximum dose will vary by patient age and by what you are using the drug to treat, but the maximum recommended beginning dose for an adult is 20 mg per day. After that, the dose meeds to be customized by your doctor, based on how your body reacts.
The risks and potential benefits of the medication must be carefully evaluated by your doctor before beginning treatment or changing the dose. Increasing the dose of Adderall also increases the risks of serious adverse events including high blood pressure, heart attack, stroke, and sudden death.