Thyroid 

Comparative Treatments of Primary Hypothyroidism in Adults

Intro: This study seeks to compare traditional animal derived thyroid supplements to synthetic thyroid hormone. 

Investigational Drug: 

Animal derived dessicated Thyroid Replacement (T3/T4) compared to Levothyroxine ((T4). 

To Qualify: Persons aged 18 to 75 on continuous thyroid replacement therapy with levothyroxine (T4) for at least 6 months, with a stable dose for 90 days.

Goal: Establish dosage equivalencies and patient satisfaction between treatment groups. All patients will be monitored and thyroid levels kept normal.