HealthCareMagic is now Ask A Doctor - 24x7 | https://www.askadoctor24x7.com

question-icon

What Causes Light-headed Feeling And Nausea While On Levothyroxine For Thyroid?

default
Posted on Mon, 30 Nov 2015
Question: I am so lightheaded that I feel a little nauseated. It's mild but worse this morning than yesterday. Any ideas as to what could be going on? I started a very low dose do Levithyroxine 2days ago. My thyroid is at 4.5.
YYYY@YYYY
doctor
Answered by Dr. Shehzad Topiwala (1 hour later)
Brief Answer:
Thyroid

Detailed Answer:
The thyroid medication called levothyroxine does not generally cause these symptoms, although in inappropriately high doses it can. However I see you have mentioned that you were started on a low dose. So it is quite unlikely that the dose is too much for you.

So you will need a detailed assessment for your symptoms. When I see someone like you I run the following laboratory tests in addition to a thorough physical examination:

CBC
CMP
Thyroid auto antibodies
25 hydroxy Vitamin D
HbA1c

I also refer the patient to a Neurologist and Cardiologist for evaluation regarding potential heart and brain related causes for your light headedness.

Obviously if your vital signs such as blood pressure and pulse are abnormal then you must go to the Emergency Room immediately
Note: For more information on hormonal imbalance symptoms or unmanaged diabetes with other comorbid conditions, get back to us & Consult with an Endocrinologist. Click here to book an appointment.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
Answered by
Dr.
Dr. Shehzad Topiwala

Endocrinologist

Practicing since :2001

Answered : 1663 Questions

Ask a specialist now
premium_optimized

The User accepted the expert's answer

Ask an Endocrinologist
Share on

Get personalised answers from verified doctor in minutes across 80+ specialties

159 Doctors Online

By proceeding, I accept the Terms and Conditions

HCM Blog Instant Access to Doctors
HCM Blog Questions Answered
HCM Blog Satisfaction
backtotop2
What Causes Light-headed Feeling And Nausea While On Levothyroxine For Thyroid?

Brief Answer: Thyroid Detailed Answer: The thyroid medication called levothyroxine does not generally cause these symptoms, although in inappropriately high doses it can. However I see you have mentioned that you were started on a low dose. So it is quite unlikely that the dose is too much for you. So you will need a detailed assessment for your symptoms. When I see someone like you I run the following laboratory tests in addition to a thorough physical examination: CBC CMP Thyroid auto antibodies 25 hydroxy Vitamin D HbA1c I also refer the patient to a Neurologist and Cardiologist for evaluation regarding potential heart and brain related causes for your light headedness. Obviously if your vital signs such as blood pressure and pulse are abnormal then you must go to the Emergency Room immediately