Hydrocortisone acid reflux!

I had craniopharyngioma surgery in 2016 and my pituitary gland is completely useless. I have zero cortisol and hypothyroidism. My doctor has me on 10 mg hydrocortisone and 5 mg levothyroxine every morning and 5mg hydrocortisone at night. My only complaint is the constant acid reflux from the hydro! I feel like if I don’t have my bottle of tums on me at all times, I’m miserable. My doctor told me to go on a PPI but there is really no good info about them, and a much higher risk of dementia from long term use. Anyone have the same issue and found relief from something other than popping tums all day? I’m worried about kidney stones when taking too many tums.