It's good that you've seen your doctor and been checked for some of the most common causes of excessive thirst -- diabetes, kidney and/or liver-related disorders, etc. However, in researching I'm not finding it to be listed as a symptom of acid reflux, so I'm not sure as to the reasoning of being prescribed Zantac. What I do find are other possible causes for excessive thirst, ranging from simple to complex:
-- Recently eating salty or spicy foods
-- Excessive loss of water and salt, possibly caused by not drinking enough water (dehydration), fluid loss during exercise, or experiencing profuse sweating, vomiting or diarrhea
-- Drugs such as anticholinergics, demeclocycline, diuretics, phenothiazines
-- An underlying disease (physical or emotional)
I hope this information is helpful. If this continues for you, be sure to keep your doctor involved.
Best regards,
Maria
I have also had an MRI to check my brian or a gland I assume. Came back normal. Dr. said it might be psycological, but I told him, "If I were just crazy or obsessed with just drinking water, that it would not wake me up in the middle of the night 4 or 5 times to drink." I do notice that when I take an ibuprophren that the thirst goes away significantly, but I can figure out why. I'm tired of this though. I don't eat salty food. I have even gone to the extent to not eat gluten, or animal product and although it helps very little, I am still extremely thirsty.