Product Resources: Thyro-Tabs® Canine Thyro-Tabs® Canine Brochure Click for larger view. Thyro-Tabs® Canine Brochure Questions and answers to help your clients understand their dog’s treatment. Download pdf Clinical Study Click for larger view. Levothyroxine Tablet Efficacy Study in Dogs The purpose of the clinical field trial was to determine the efficacy of Thyro-Tabs® levothyrozine sodium tablets, USP, in hypothyroid dogs and the effect of treatment on basal metabolic rate. Download pdf Find a Rep