Key takeaways
Phentermine (Adipex-P) and Adderall (dextroamphetamine/amphetamine salts) are both stimulant medications, but they are used for different purposes. Phentermine is a sympathomimetic used for short-term weight management in adults with a high body mass index (BMI), while Adderall is used to treat attention deficit-hyperactivity disorder (ADHD) and narcolepsy. Phentermine is typically taken once daily, whereas Adderall can be taken multiple times a day. Both medications are available as a lower-cost generic and are controlled substances due to their risk to lead to misuse and dependence. Common phentermine side effects include dry mouth and trouble sleeping, while Adderall can cause loss of appetite and trouble sleeping. Both medications can raise blood pressure and heart rate. Avoid alcohol with both medications and be sure your prescriber and pharmacist have a complete list of your medications.
