Track Your Vyvanse Timeline & Clearance
Understand your 10–14 hour duration, map the rate-limited red blood cell enzymatic conversion, and ensure your evening levels drop below the sleep threshold.
Prodrug Enzymatic Conversion Pharmacokinetics
Normalized plasma concentration of inactive prodrug vs active d-amphetamine over 14 hours.
Vyvanse: prodrug conversion to active d-amphetamine
Lisdexamfetamine is absorbed in the gut via PEPT1 transporters. Enzymes in red blood cells begin hydrolyzing the lysine bond into active d-amphetamine.
Active d-amphetamine reaches peak plasma concentration. Because conversion is rate-limited by enzyme kinetics, it provides a stable focus plateau without sharp spikes.
Gradual hepatic and renal clearance. Blood levels taper smoothly below sleep interference thresholds without the severe irritability of rapid IR crashes.
Vyvanse & Global Lisdexamfetamine Brands
Lisdexamfetamine is prescribed under multiple global brand names with identical pharmacokinetic prodrug behavior.
| Brand / Generic | Manufacturer | Formulation Type | Standard Strengths | Region |
|---|---|---|---|---|
| Vyvanse | Takeda | Prodrug Capsule / Chewable | 10, 20, 30, 40, 50, 60, 70 mg | United States / Canada |
| Elvanse / Elvanse Adult | Takeda / Shire | Prodrug Capsule | 20, 30, 40, 50, 60, 70 mg | UK / Germany / European Union |
| Tyvense | Takeda | Prodrug Capsule | 20, 30, 40, 50, 60, 70 mg | Ireland |
| Aduvanz | Takeda | Prodrug Capsule | 20, 30, 40, 50, 60, 70 mg | Nordics (SE, NO, DK, FI) |
| Samexid | EMS Pharma | Prodrug Capsule | 30, 50, 70 mg | Brazil |
| Lisdexamfetamine Generics | Mylan / Hikma / Teva / Sun | Prodrug Capsule | 10, 20, 30, 40, 50, 60, 70 mg | US / Global |
60–90m Conversion Lag
Takes slightly longer to activate than immediate-release salts because of the enzymatic cleavage step in red blood cells.
3.5–5h Smooth Peak Window
Provides a sustained, rate-limited focus plateau with fewer peripheral jitters than racemic mixed-salt formulations.
10–14h Extended Half-Life
Long biological duration. Taking your dose early in the morning ensures adequate clearance before your target sleep time.
Caffeine Interaction with Vyvanse
While Vyvanse provides a smoother CNS profile than mixed amphetamine salts, stacking multiple cups of coffee can overpower the subtle onset and accelerate heart rate. Late afternoon caffeine stacks onto Vyvanse's long elimination tail, compounding sleep interference.
Simulate Your Vyvanse Timeline Live
Enter your dose (20mg, 30mg, 40mg, 50mg, 60mg, 70mg), intake time, and caffeine schedule to model your exact peak window and bedtime clearance.
How FocusCurve Masters Your Vyvanse Day
Tailored specifically for the 10–14 hour timeline of lisdexamfetamine.
2-Tap Dose Logging
Log your morning dose in under two seconds. Backdate doses if you took your capsule earlier.
Home Screen Widget
See your live active d-amphetamine curve and remaining focus window right from your Home Screen.
Pill Inventory Countdown
Track remaining controlled capsule counts with smart refill countdown reminders.
100% On-Device Privacy
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Evidence-backed guide
Read the cited guide to Vyvanse’s prodrug conversion, peak, duration, and food effects.
How long does Vyvanse last? →Methodology & Citations
Last reviewed: August 30, 2026
Curves use published pharmacokinetic parameters and normalized population averages. They estimate likely timing; they cannot predict an individual response or replace prescriber guidance.
Frequently Asked Questions
How long does Vyvanse actually last?
Vyvanse is formulated to provide 10 to 14 hours of continuous symptom control. Because conversion is rate-limited by red blood cell enzymes, blood levels rise steadily to peak between 3.5 and 5 hours, tapering off gradually into the evening.
What is a prodrug and how does enzymatic cleavage work?
A prodrug is inactive when ingested. Lisdexamfetamine is absorbed intact in the small intestine via PEPT1 active carrier peptide transporters and enters erythrocytes (red blood cells). Enzymes inside red blood cells cleave the peptide bond to release active d-amphetamine.
Why is the Vyvanse wear-off smoother than Adderall?
Adderall relies on a 50:50 mix of immediate and enteric-coated beads which produce two distinct peaks and a noticeable midday transition. Vyvanse relies on biological enzymatic cleavage, creating a smooth bell curve with a gentle descending slope.
Can I take Vyvanse with food or Vitamin C?
Yes, prodrug absorption in the gut is unaffected by stomach pH or meal composition. However, once converted into active d-amphetamine in the blood, urinary acidification (such as from high-dose Vitamin C) accelerates renal excretion and can shorten your active focus duration.
What are the international brand names for Lisdexamfetamine?
Lisdexamfetamine is marketed as Vyvanse (US/CA), Elvanse or Elvanse Adult (UK/EU), Tyvense (Ireland), Aduvanz (Nordics), and Samexid (Brazil). Generic equivalents share identical pharmacological release characteristics.
Understand Your Vyvanse Timeline in Total Privacy
Log doses in 2 taps, see an estimated prodrug curve on your Home Screen widget, and support your sleep planning.
Medical Disclaimer: FocusCurve is an educational medication-timeline and dose-logging tool, not a medical device or diagnostic instrument. Estimated pharmacokinetic profiles are based on published population-average clinical data. Individual metabolism varies. Always consult your prescribing physician before altering your medication regimen.