What Causes Headache And Tiredness On Reducing Armor Dosage?

I had my thyroid removed due to Cancer of the Thyroid. I cannot take synthroid because it appeared to elevate my blood pressure. I have been taking armor 90mg bid..6 am and Noon. I jus ad my blood drawn and my TSH was not measurable, T3 was high and T4 normal. I took the test at 9AM not fasting and had taken the morning dose of Armor I have felt fine, sleeping, not hungry, good energy, no heart palps. Endocrinologist has ordered a 30 mg reduction in Armor. I did this for two days, have a headache, hungry, and tired. Opinion please.