Is it okay to drink a lot of water because of extreme thirst with adrenal issues?

Adrenal issues. U have to be specific about " adrenal issues" , because there can be many different things that can be wrong with the adrenal gland. However based on the nature of this question , it appears it is related tomadrenal insufficiency. If that is the case, then it is extremely important to keep yourself hydrated but preferably with the electrolyte full water not plain water. Gatrorade is a good choice.