Stimulant — amphetamine
Mydayis
Mixed amphetamine salts (triphasic ER)
DEA Schedule II FDA approved adults
Pediatric ages 13+
How it works
Three-bead pulsatile delivery extends amphetamine release across the day.
At-a-glance
- Onset of effect
- 1–2 h
- Typical duration of effect
- 14–16 h
- Half-life
- ~10–13
- Formulations
- Oral capsule (triphasic)
- Adult dose range
- 12.5–50 mg once daily in the morning
FDA max: 50 mg/day (adults), 25 mg/day (ages 13–17)
Common side effects
- Insomnia
- Decreased appetite
- Dry mouth
- Weight loss
Important warnings
- Schedule II
- Cardiovascular risk
Notes
Marketed for "all-day" duration; later evening offset can disrupt sleep more than 12-hour formulations.
Source
Reference data is sourced from the current FDA prescribing information at DailyMed. Dose ranges, approved ages, and warnings change over time — always check the current label and consult your prescriber.