Cannot get any help from vets , what would you do if these were human results ?
Results October 2017: first thyroid test , not on any meds
T4 : 33 ( 13-52)
FT4 : 13.9 (7-40)
T3 antibodies : 0.7 (<2.0)
T4 antibodies: 0.9 (<2.0)
TSH: 0.12 (<0.41)
TGA: 114 (<200)
T3: 109.4 ( 20-206)
FT3: 4.7 (3.7-9.2)
January 2018, Thyroid retest , not on any meds : ( some mild symptoms of hypo )
T4: 17.3 ( 10-55)
TSH: 0.21 (0.01-0.06)
FT4: 8.5 (6.6- 40)
TGA : 6 negative ( no range given )
T3: 70.4 (20-206)
FT3: 5.1 (3.7-9.2)
MCHC: 32.7 (32.6-39.2)
Triglycerides : 1.84 ( 0.30-1.20)
After this test we started Levo 400mcg twice a day (mid normal dose ), and improvement came . Then 6 weeks retest :
March 2018: on Levo 400mcg x 2/ day apart from food , no ther meds :
Total T4: 44 (11-60)
TT3: 1.1 (0.8-2.1)
FT4: 19 (6-42)
FT3: 3.5 (1.2- 8.2)
T4 antibodies 6 ( 0-20)
T3 antibodies 2 (0-10)
TSH: 0.04 (0.00-0.58)
TGA : 8 ( 0-35)
Based on still quite low fT4 we increased the dose to 600mcg twice a day ; he worsened very quickly so after 4 weeks rested and results supported the symptoms :
TSH: <0.03 ( <0.41)
TotalT4: 32.7 (13-52)
FT4: 10.8 (7-40)
Dropped the dose down to 400 again ; does dropping the dose take 4-6 weeks to work , same as increase ?
I would like to wean him off the thyroid meds as he never had TGAs ? I am suspicious dietary / nutritional deficiencies may have caused the drop in TH in this otherwise young healthy dog ?
Do I decreased the dose every 4 weeks and wean off slowly ?
B12 , folate and iron/ ferritin tests pending !
Vit D not possible to test in dogs .
Currently giving good multivitamin apart from Levo.
Please guys help me understand these results ?
I suspect the higher dose of Levo was too much and he started converting T4 into rT3 ( not possible to testin dogs )- we call it “dumping the excess T4 which will result in hypo ; dogs almost impossible to get thyrotoxicosis.
Thank you so much