### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I am a 67 year old woman, under alot of stress for a couple of years especially because my husband and partner of 37 years died a year and a half ago, and have been taking a natural thyroid medication for a year and a half. My heart has been racing, I ve been advised by my Osteopath and Naturopath to reduce my Naturthroid (sp?) from 1+1/4 grains to 3/4 grains or even as low as 1/2 grain. I began reducing the dosage 4 days ago. Until today, when my heart started racing somewhat again, I felt better BUT.........here s my question.......last night I made some organic popcorn with brewer s yeast and some butter. It tasted bitter. I thought the brewer s yeast had gone bad. This morning I made a small mushroom and spinach omelet with swiss cheese and it tasted very bitter. I everything I ve tasted tastes bitter. My Osteopath on the phone said not to worry, that it wasn t important. But I m very weirded out. I ve been very healthy most of my life and having my heart race and now having a bitter almost metallic taste in my mounth is scary. Question.....What s going on the cause the bitter taste in my mouth

### output:

Hi, Regarding you racing heart, it suggests probably thyroid dose is heart causing this racing. So you get your TSH levels done, it will give the exact idea of thyroid status. Regarding your second problem, I think this can be related to herbal medicine, so you have to discuss with your herbal doctor for this. Do you have any bloating, burping, nausea, upper abdominal pain? If yes suggest gastritis and acidity problem. Hope I have answered your query. Let me know if I can assist you further. 