Addison's disease is a hormonal disorder. In this disease insufficient amounts of certain hormones is produced by your adrenal glands. Treatment for Addison's disease involves taking hormones to replace the insufficient amounts.
Why you are taking synthroid which is used to treat thyroid disorders? Check with your doctor.
There should be hormone replacement therapy to correct the levels of steroid hormones. Also,
make sure that the doses of replacement hormones are adequate but not excessive. Stay connected with your doctor.