When is this performed?
- To help distinguish the various causes of low steroid levels in the body.
What does the test involve?
- The administration of a drug (Tetracosactrin at a higher dose than in the short synacthen test) and the taking of blood samples to measure cortisol and ACTH levels.
Are there any side-effects?
- Usually none
How long does the test take and is admission to hospital required?
- This test can may be performed in various ways. One version lasts one day and another is performed over 3 days. This test can be performed without admission to hospital.
What should you tell your doctor?
- If you are taking steroid medication by any route: oral, topical, inhaled, injection