FDA-Approved Vyvanse Dosing for 14-Year-Olds
For a 14-year-old with ADHD, the FDA-approved starting dose of Vyvanse is 20-30 mg once daily in the morning, with weekly titration by 10 mg increments up to a maximum of 70 mg daily. 1
Dosing Algorithm
Starting Dose
- Initial: 20-30 mg orally once daily in the morning 2
- Administer after waking, can be taken with or without food 1
Titration Schedule
- Increase by 10 mg weekly until optimal response is achieved 2
- Maximum dose: 70 mg/day 1
- Assess response using parent, teacher, and adolescent self-ratings at each dose adjustment 3
Monitoring Requirements
Initial Phase (First 2-4 weeks):
- Weekly contact (can be by telephone) during dose titration 4
- Assess target ADHD symptoms from multiple informants
- Monitor for common side effects: decreased appetite, insomnia, weight loss, headache 5
Maintenance Phase:
- Monthly visits until symptoms stabilized 4
- Quarterly blood pressure and pulse checks 4
- Regular height and weight monitoring for growth suppression 6
Important Adolescent-Specific Considerations
Before initiating treatment, screen for:
- Substance abuse symptoms (assess when off substances before treating ADHD) 3
- Cardiovascular risk factors (obtain baseline blood pressure, pulse, physical exam) 4
Diversion risk: Vyvanse has lower abuse potential than immediate-release amphetamines because it is a prodrug requiring metabolic conversion by red blood cells to become active 3. This makes extraction and alternative routes of administration ineffective.
Driving coverage: For adolescents who drive, ensure medication coverage extends through driving hours—consider timing of once-daily dose or need for afternoon coverage 3
Common Pitfalls to Avoid
- Don't underdose: The therapeutic range is 30-70 mg for most adolescents; starting at 20-30 mg is appropriate, but many will require higher doses 1
- Don't skip the titration: Weekly 10 mg increases allow proper assessment of response versus side effects 2
- Don't ignore cardiovascular monitoring: Baseline and ongoing vital signs are essential—mean increases of ~7 bpm pulse and 3-4 mmHg blood pressure are expected 5
- Monitor growth: Mean weight gain may be reduced (~2 kg less than expected over 2 years), though height velocity typically normalizes 5
Side Effect Profile
Most common treatment-emergent adverse events in adolescents (from 2-year safety data) 5:
- Decreased appetite (49.4%)
- Weight decrease (18.2%)
- Insomnia (13.1%)
- Irritability (8.6%)
- Headache (5.7%)
Timing: Most side effects peak in first 4-12 weeks, with median onset of decreased appetite at 13.5 days and insomnia at 17 days 5
Serious psychiatric events are rare: In long-term studies, psychosis/mania (0.3%), suicidal ideation (0.6%), and aggression (4.5%) were infrequent 5