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Possibly the thyroid
replacement has been excessive...the dose must be adjusted on TSH measurement...Decadron
is a powerful steroid and its role in migraine
is not beyond question...
Fever and anxiety also contribute...
You need to be examined again; EKG / HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) /MRI Brain / LABORATORY work-up – may all be necessary for further assessment and assistance.
The treating doctor may suggest them depending on need, based on his assessment of the situation.
Wishing speedy recovery