Can adrenal insufficiency cause high blood pressure or low blood pressure?

Low blood pressure: Low blood pressure is a common feature of adrenal insufficiency. Overtreatment with too high a dose of steroids can lead to high blood pressure.

Untreated-low BP: When the adrenal glands don't work, blood pressure can be low if someone is not yet diagnosed or under-treated for the condition. An addisonian crisis can cause blood pressures to plummet leading to shock.