Hello,
I can understand your concern.
Metallic taste in mouth could be due to medications,
food allergies or CNS problem. It is possible that the medicines you might be taking for
cardiomyopathy and probably control of blood pressure may cause metallic taste in mouth.
In addition, some CNS disorder that impairs the sensory messages to brain from several areas of body can be responsible for the metallic taste in mouth. As your head and back are hurting and your are feeling dizzy too, I would advise you to visit the doctor treating you for Devic's syndrome to figure pout if nerves responsible for perceiving taste sensations in brain are okay.
Unfortunately, very less can be done to help the metallic sensation until the underlying cause is cured. However, chewing sugarless gums, brushing teeth after meals, trying different seasonings and foods, using nonmetallic dishes, and drinking lots of fluids can help.
I hope this information helps. Thank you for choosing HealthcareMagic. Let me know if you have follow up questions.
Best,
Dr. Viraj Shah