Synthetic ACTH, also known by the brand name cosyntropin, is a medication used for two main purposes:
1. ACTH Stimulation Test:
This is a diagnostic test that assesses the function of the adrenal glands. Synthetic ACTH acts just like the natural ACTH hormone produced by your pituitary gland. The test procedure involves:
- Drawing a baseline blood sample to measure your initial cortisol level.
- Injecting synthetic ACTH.
- Drawing additional blood samples after a set time (usually 30 and 60 minutes) to measure cortisol levels again.
By comparing the cortisol levels before and after the synthetic ACTH injection, doctors can determine if your adrenal glands are responding normally and producing sufficient cortisol.
2. Treatment of Specific Conditions (Limited Use):
In some cases, synthetic ACTH may be used as a treatment for specific conditions, although this use is less common than the diagnostic test. Examples include:
- Minimal change disease: A kidney disorder causing excessive protein loss in the urine.
- Membranous nephropathy: Another kidney disorder affecting the filtering membranes in the kidneys.
- Infantile spasms: A severe form of epilepsy in infants.
However, it's important to note that synthetic ACTH is not a first-line treatment for these conditions, and other medications are typically preferred.
Here are some additional points about synthetic ACTH:
- It is typically administered as an injection, either intravenously (into a vein) or intramuscularly (into a muscle).
- Common side effects can include nausea, vomiting, headache, and allergic reactions at the injection site.
- Synthetic ACTH is not suitable for everyone and should not be used in people with certain medical conditions, such as active infections or uncontrolled high blood pressure.