> Western Medicines > Somatropin


Used for:Growth hormone deficiency
Chinese name:

What is Somatropin for?

Somatropin is a hormone belonging to a class of medications called endocrine drugs. It has the same structure as human growth hormone, which serves the purpose of assisting growth, development and other metabolic processes.

How to use it?

Somatropin is injected through a needle subcutaneously as directed by your doctor. Your doctor will advise you on the dosage based on your age, weight and the type of formulation used.


Growth hormone deficiency
Initially, 6 mcg/kg daily. May increase gradually according to patient response, up to 12.5 mcg/kg daily. Reassess 9 months after starting treatment.

25-35 mcg/kg daily. Reassess 9 months after starting treatment.

100-200 mcg daily with a lower starting dose and smaller dose increments.

What are the side effects of Somatropin?

Common side effects of Somatropin include, but not limited to, peripheral edema, abdominal pain, hypoesthesia, vomiting and infection.

Who should not take Somatropin?

  • People allergic to Somatropin or any component of the formulation.
  • Children in growth promotion with closed epiphysis
  • Patients with Prader-Willi syndrome or active intracranial tumor as there are other contraindications specific for some formulations, please refer to the manufacturer’s label to check if you are suitable for the formulation.


There are some more contraindications, so please consult your physician before starting somatropin.

Pharmacist Tips:

  • Do not shake the formulation.
  • Do not inject into the veins.
  • Rotate the injection sites every day to avoid tissue atrophy.

Common dosing schedule:
Inject Somatropin subcutaneously once every day. For example, inject after waking up before going to work.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Somatropin may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Somatropin in Hong Kong?

In Hong Kong, Somatropin is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.


For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Somatropin in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Brands in Hong Kong
Available dosage
  • 5.3mg / 8mg / 4IU / 10IU (Injections)
  • 5mg/1.5ml / 6mg/1.03ml / 10mg/1.5ml / 12mg/1.5ml / 20mg/2.5ml (Solution For Injection)
Drug class
Endocrine Drugs
Sub class
Alternative Names
Growth hormone
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