Stimulant Crash Predictor
Input your ADHD medication and the time you took it. We will estimate your therapeutic window, peak plasma concentration, and the specific hour your comedown will hit.
Important: Pharmacokinetics are highly individualized. This tool provides an estimate based on clinical half-lives. Your genetics, stomach acidity (pH), and diet will alter this timeline. This is not absolute clinical advice.
A prodrug that your body must convert into dexamphetamine. Offers a smoother rise and fall.
Serum Plasma Density Curve
Peak Serum Concentration
The medication reaches maximum density in your bloodstream. You are deep within the "Therapeutic Window" where dopamine levels are saturated and focus is at its highest.
The Comedown Window
The half-life arithmetic is catching up. You may experience irritability, a sudden return of ADHD symptoms, teeth grinding, or a "zombie" feeling.
Rescue Protocol
Safe to Sleep
Blood plasma levels have typically dropped low enough to permit natural melatonin production and deep REM sleep. Note that if you lack magnesium, your nervous system may still feel artificially "wired."