DoseCompass / Medications / Dexedrine / Zenzedi (IR)
Dexedrine / Zenzedi (IR)
dextroamphetamine · Amphetamine class
Pure dextroamphetamine — the more potent isomer, without the levo component in Adderall. Some people find it smoother with less physical edge.
*Approximate U.S. cash price for a 30-day supply with a free discount card, mid-2026. Compare current prices on GoodRx.
Available strengths
2.5 mg · 5 mg · 7.5 mg · 10 mg · 15 mg · 20 mg · 30 mg
How long it lasts
Typical effective duration is 4–6 hours, though metabolism, sleep, and food timing move this meaningfully for individuals. See how it compares to every other product on the duration chart.
Approximate dose equivalents
Every marketed Dexedrine / Zenzedi (IR) strength translated into five common alternatives (total-daily-dose basis). Cross-class figures (†) use the rough ~2:1 amphetamine↔methylphenidate heuristic and are the least precise.
| Dexedrine / Zenzedi (IR) | Adderall IR | Adderall XR | Vyvanse | Ritalin IR | Concerta | Focalin |
|---|---|---|---|---|---|---|
| 2.5 mg | ≈ 3.3 | ≈ 3.3 | ≈ 8.3 | ≈ 5 † | ≈ 6 † | ≈ 2.5 † |
| 5 mg | ≈ 6.7 | ≈ 6.7 | ≈ 16.7 | ≈ 10 † | ≈ 12 † | ≈ 5 † |
| 7.5 mg | ≈ 10 | ≈ 10 | ≈ 25 | ≈ 15 † | ≈ 18.1 † | ≈ 7.5 † |
| 10 mg | ≈ 13.3 | ≈ 13.3 | ≈ 33.3 | ≈ 20 † | ≈ 24.1 † | ≈ 10 † |
| 15 mg | ≈ 20 | ≈ 20 | ≈ 50 | ≈ 30 † | ≈ 36.1 † | ≈ 15 † |
| 20 mg | ≈ 26.7 | ≈ 26.7 | ≈ 66.7 | ≈ 40 † | ≈ 48.2 † | ≈ 20 † |
| 30 mg | ≈ 40 | ≈ 40 | ≈ 100 | ≈ 60 † | ≈ 72.3 † | ≈ 30 † |
All values ≈ mg/day, from published cross-titration references and product labeling. For a custom dose or frequency, use the interactive converter.
Common questions
What strengths does Dexedrine / Zenzedi (IR) come in?
Dexedrine / Zenzedi (IR) (dextroamphetamine) is available in: 2.5, 5, 7.5, 10, 15, 20, 30 mg.
How long does Dexedrine / Zenzedi (IR) last?
Typical effective duration is 4–6 hours, though individual metabolism varies.
Is there a generic Dexedrine / Zenzedi?
Yes. With a free discount card, a typical 30-day supply runs about $18–45 without insurance.
What is Dexedrine / Zenzedi (IR) equivalent to?
As a total-daily-dose approximation, Dexedrine / Zenzedi (IR) 10 mg is ≈ 13.3 mg Adderall XR, ≈ 33.3 mg Vyvanse, ≈ 20 mg/day methylphenidate (Ritalin). These are discussion figures from published cross-titration references — cross-class conversions are rougher, and actual switches are titrated by your prescriber.