Clonidine test

List of dynamic tests

To investigate somatotropic function by stimulating growth hormone production.

Subject preparation

Subject fasting for 12 hours and at rest for 30 min.


Clonidine (Catapressan®, 0.150 mg tablets) Boehringer Ingelheim France.


One 0.150 mg Catapressan® tablet.

  • Samples (dry tubes) at time intervals: -15 min (T-15) and 0 (T0).
  • Oral administration of one Catapressan® tablet.
  • Samples (dry tubes) at time intervals T+30, T+45, T+60, T+90 and T+180 min.

After centrifugation, freeze serum at –20°C.

Side effects
  • Close medical supervision is required due to the risk of HYPOTENSION
  • Check pulse and blood pressure every 30 min.
  • If blood pressure drops or the patient feels faint, administer one 100 mg vial of hydrocortisone sodium succinate.

Growth Hormone (GH).

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