@HABS93 - prednisone can cause increased potassium excretion (
https://www.drugs.com/tips/prednisone-patient-tipshttps://www.drugs.com/tips/prednisone-patient-tips)
So the prednisone may be causing your potassium levels to drop, and palpitations are a very common symptom of low potassium. It's happened to many people here. A simple and easy way to see if potassium can help your palpitations is to drink several glasses of low-sodium V8 or other low-sodium vegetable juice, which are high in potassium. Just recently someone here had the same symptoms of palpitations and they drank I think 2 or 3 glasses of either tomato juice or low-sodium V8 and within a few hours were noticeably better.
Also low potassium can make you very tired. I've experienced this. It's an awful feeling.
And if your potassium is low, I don't think one or two bananas would give you enough potassium to see if this is the problem.
Also, fwiw, persons with ME/CFS can have low intracellular potassium despite normal blood levels. (see
https://forums.phoenixrising.me/thr...ded-in-methylation-treatmt.18670/#post-291422) I know you don't know if all your symptoms have been due to sarcoidosis or if you might have ME/CFS as well, but I'm just pointing this out in case your blood work may show up normal for potassium, but it doesn't necessarily mean that your cellular levels are okay.
Anyways, if the low-sodium V8 or equivalent helps you, then you might consider taking a potassium supplement with your prednisone. Obviously you can talk to your doctor about this.
Take care --