5 years of synthroid i stopped and started levoxyl (thyroxine) for a good 3 weeks then stopped took armour back on synthroid did cause my hair to fall out?

Thyroid medications: Your replacement dose of thyroid is decided on the basis of blood test and should be stabilized based on a particular type and preferably same manufacturer changing types and branding can result in variable levels and can effect hair loss there are generally no reasons to switch thyroid medicine unless a good reason established by your physcian.