Acute BP and Heart Rate Rises After Single 25 mg Nonprescribed Adderall

A Mayo Clinic study observed acute hemodynamic changes after a single 25 mg dose of amphetamine–dextroamphetamine salts (Adderall) in Adderall-naïve, healthy young adults without a medical indication for the medication.

Investigators described measurable increases in blood pressure and heart rate, along with significant increases in plasma norepinephrine levels indicating sympathetic activation, following this one-time exposure. The report frames these findings as short-term physiologic responses in people without prior exposure to the medication. Overall, it presents the episode as a single-dose snapshot of cardiovascular physiology rather than an evaluation of long-term treatment effects.

The study’s stated primary objective was to examine how one 25 mg dose acutely affects cardiovascular hemodynamics—blood pressure and heart rate—and sympathetic activity in young adults without a medical indication for Adderall. In a randomized, double-blind, placebo-controlled crossover study of 29 healthy adults (mean age 27 years), participants received Adderall and identical placebo on separate occasions. Resting systolic blood pressure increased from 116±2 mm Hg to 126±2 mm Hg (P<.001) after Adderall, while no change occurred with placebo. Diastolic blood pressure increased by 6±1 mm Hg, mean blood pressure increased by 7±1 mm Hg, and heart rate increased by 10±2 beats per minute (all P<.01). Plasma norepinephrine levels increased from 215±15 pg/mL to 301±14 pg/mL (P=.027), with no change after placebo.

The authors concluded that healthy Adderall-naïve participants consuming a single dose manifest striking increases in blood pressure, heart rate, and sympathetic activation, even at rest. These findings may have important mechanistic implications for understanding acute cardiovascular events associated with illicit Adderall use.

Key Takeaways:

• Measurable increases in systolic (+10 mm Hg), diastolic (+6 mm Hg), and mean blood pressure (+7 mm Hg), along with a 10 bpm rise in heart rate, were observed after a single 25 mg dose in Adderall-naïve, healthy young adults in a randomized placebo-controlled study.
• Plasma norepinephrine levels increased significantly, indicating sympathetic activation.
• The authors suggest these findings may help explain acute cardiovascular events associated with illicit Adderall use.