<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am of 70 years. I have tremendous weakness. I cant even feel like walking and feel that I am sinking. I have high BP Sugar in control with Med and TSh 12.5. I have not yet started taking medicine for TSH. Please advise.  <response>: Hi, Welcome. This is Chat Doctor. Persistent weakness could be because of thyroid you definitely need medicine for it. For such patients we Start with 12.5mcg of Thyroxine than increase it to 25mcg after a week. Continue following up with your physician so that dose could be increased further. Also test your It D3 level to see for any deficiency treatment accordingly. Come back if you need any more help. Thanks 