Dosages
Side effects in children
Warnings & precautions in children
Contra-indications in children

Interactions
PK
Renal impairment
References

Somatrogon

Generic name
Somatrogon
Brand name
ATC Code
H01AC08

Pharmacokinetics in children

Somatrogon pharmacokinetics (PK) was assessed using a population PK approach for somatrogon in 42 paediatric patients (age range 3-15.5 years) with GHD.

Cmax=  636 ng/mL with 0,66 mg/kg/week
Tmax= 6 - 18 hours
Vd= 0,728 L/kg (central) and 0,165 L/kg (peripher)
Cl= 0,0317 L/hours/kg
T1/2= 28,2 hours
[SmPC Ngenla]

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dose recommendation of formulary compared to licensed use (on-label versus off-label)

No information is present at this moment.

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Available formulations

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Dosages

Growth disorders resulting from growth hormone deficiency, neonatal hypoglycemia due to GH deficiency
  • Subcutaneous
    • ≥ 3 years
      • 0.66 mg/kg/dose once per week. Adjust dose as needed based on effect and IGF-1 serum concentration.
      • When switching from daily growth hormone treatment to weekly somatrogone treatment: administer the first dose on the day after the last daily injection.

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Renal impaiment in children > 3 months

No information available on dose adjustment in renal impairment.

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The complete list of all undesirable drug reactions can be found in the national Summary of Product Characteristics (SmPC) – click here

Side effects in children

Very common: headache, injection side reactions, pyrexia

Common: anaemia, eosinophilia, hypothyroidism, allergic conjunctivitis, arthralgia, pain in extremity

Uncommon: adrenal insufficiency, rash generalised

[SmPC Ngenla]

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The complete list of all contra-indications can be found in the national Summary of Product Characteristics (SmPC) – click here

Contra-indications in children

  • growth promotion in children with closed epiphyses

[SmPC Ngenla]

The complete list of all warnings and precautions can be found in the national Summary of Product Characteristics (SmPC) – click here

Warnings & precautions in children

  • Somatrogon has not been studied in patients with Prader-Willi syndrome. Somatrogon is not indicated for the long-term treatment of paediatric patients who have growth failure due to genetically confirmed Prader-Willi syndrome unless they also have a diagnosis of GHD. There have been reports of sudden death after initiating therapy with growth hormone in paediatric patients with Prader-Willi syndrome who had one or more of the following risk factors: severe obesity, history of upper airway obstruction or sleep apnoea, or unidentified respiratory infection.
  • Because somatrogon increases growth rate, signs of development or progression of scoliosis should be monitored during treatment.
  • Epiphyseal disorders, including slipped capital femoral epiphysis may occur more frequently in patients with endocrine disorders or in patients undergoing rapid growth. Any paediatric patient with the onset of a limp or complaints of hip or knee pain during treatment should be carefully evaluated.

[SmPC Ngenla]

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Interactions

The complete list of all interactions can be found in the national Summary of Product Characteristics (SmPC) – click here

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References

  1. European Medicines Agency, EPAR Ngenla® (EU/1/21/1617/001), 06/2022
  2. Pfizer Europe MA EEIG, SmPC Ngenla® 24 mg/ 60 mg Injektionslösung im Fertigpen (EU/1/21/1617/001), 03/2024

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Changes

Changes