Hello urblondie204
Welcome to HCM
Thyroid medication or thyroxin when ever taken may cause increase in heart beat, sweating, tremors, increased venous pulsations or in neck veins. Long term use may cause
weight loss. Thyroxin 37.5 is not a very high dose but consult your doctor for necessary dose reductions as any amount of excess thyroxin may cause these symptoms like
anxiety. And also get your thyroid function checked.
Hope I cleared your doubt.
take care.