No, 400 mcg of sermorelin daily for 5 days per week is not the normal dosage
The established dosage for sermorelin in children with growth hormone deficiency is 30 mcg/kg bodyweight given subcutaneously once daily at bedtime, not a fixed 400 mcg dose. 1
Why This Dosage Matters
The critical issue with a fixed 400 mcg dose is that sermorelin dosing must be weight-based to be effective and safe. A 400 mcg dose would only be appropriate for a child weighing approximately 13 kg (about 29 pounds), and even then, it should be given daily, not 5 days per week.
Correct Dosing Protocol
- Standard dose: 30 mcg/kg bodyweight subcutaneously once daily at bedtime 1
- Frequency: Daily administration, not intermittent 5-day-per-week dosing
- Route: Subcutaneous injection
- Timing: Bedtime administration to align with natural growth hormone secretion patterns
Clinical Evidence
The research supporting sermorelin use demonstrates that:
- 30 mcg/kg bodyweight daily produced significant increases in height velocity sustained over 12 months of treatment 1
- This dosing induced catch-up growth in the majority of growth hormone-deficient children 1
- The medication was well tolerated at this dose, with only transient facial flushing and injection site pain as common adverse events 1
Common Pitfalls
Weight-based calculation errors: Always recalculate the dose as the child grows. A fixed 400 mcg dose fails to account for weight changes during treatment.
Intermittent dosing: The 5-day-per-week schedule has no evidence base. Daily administration is required for sustained growth hormone stimulation and consistent therapeutic effect.
Diagnostic vs. therapeutic dosing confusion: The 1 mcg/kg intravenous dose used for diagnostic testing of growth hormone deficiency is entirely different from the 30 mcg/kg subcutaneous therapeutic dose 1.
Practical Application
For a child weighing 40 kg, the correct dose would be:
- 40 kg × 30 mcg/kg = 1,200 mcg (1.2 mg) daily
This is three times higher than the 400 mcg mentioned in your question, illustrating why weight-based dosing is essential.