https://www.vetsurgeon.org/f/clinical-questions/7667/treating-hypocalcaemia-in-post-thyroidectomy-cats I have a problem with an older cat that I have had to perform a 2nd thyroidectomy on last week; I removed his first enormous thyroid tumour about 18 months ago (but couldn&#39;t identify the parathyroid) , and the remaining thyroid was a tiny bit abnormalen-USTelligent Community 10https://www.vetsurgeon.org/thread/34226?ContentTypeID=1Mon, 07 Mar 2011 19:31:28 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:b058384f-f60e-4f33-9c0e-d1e759be96c3Martin Atkinson<p>I used Collocal D and dihydrotachsterol (AT10) on the only long-termer I had with post-thyroidectomy hypocalcaemia but I believe that like Amanda&#39;s case it was finally stabilised on just AT10. This case had a large amount of irony attached to it. It presented&nbsp;with bilateral goitre at a relatively young age (about 5yrs if I recall correctly) and the only drug available was generic Neo-mercazole which made the cat vomit. Because of this&nbsp;I advised radio-iodine therapy, there was only place in Canterbury doing it in the whole country then but the owners declined on cost grounds. Besides the side effects It was difficult&nbsp;to pill and difficult take blood for repeated T4 tests so I performed a bilateral thyroidectomy. I&#39;ve always had difficulty reliably identifying&nbsp;the parathyroids (never quite looks like the two little white dots in the surgical textbook) so use a technique to preserve the capsule and hopefully the parathyroids and thier blood supply with it but obviously failed and the cat went hypocalcaemic. All the others I&#39;ve had have recovered after a couple of weeks with minimum medication required but not this one, so irony number one - it had to have even more monitoring for its hypercalacaemia than if it had stayed on neo-mercazole. Irony number two, after about a year it went hyperthyroid again, referral for scintigraphy showed a large amount of thoracic adventitious thyroid tissue so guess what? Yup it went for radio-iodine treatment which worked well but it remained hypocalcaemic for the rest of its life although we did find a stable dose that required little monitoring.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/34224?ContentTypeID=1Mon, 07 Mar 2011 18:53:01 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:5f21610e-97a8-4163-b7a6-c08c343921beAmanda Nicholls<p>I use AT 10 without supplementing calcium as long as the cat is eating well. Works very well and quickly. Usually start on 0.5mls / day then wean off over a few weeks with close monitoring of iCa.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/34216?ContentTypeID=1Mon, 07 Mar 2011 17:37:53 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:3de6d9d7-7013-4f79-b5f9-893dc59b0053Julian Earl<p>There is also a case for not over-dosing with calcium because that will delay the natural re-production of PTH. You can only judge this by close monitoring of the Ca levels - keep them in the borderline of low to low normal range.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/34214?ContentTypeID=1Mon, 07 Mar 2011 16:06:48 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:78be24f3-8f91-445c-b75d-25bd2c8a3c44CatherineThomas<p>We have a cat in the practice who had her 2nd thyroid removed in dec 2008. Since then she has been kept stable with AT 10 and calcium lactate powder, although she has had the occassional problem when her calcium levels have dropped. I asked vetark about zolcal D and they sent me information about using it in cats. It&#39;s much cheaper than the AT 10. I don&#39;t really know why but the owner didn&#39;t like the zolcal D, or didn&#39;t think it was working as well and wouldn&#39;t really give it a chance.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/34213?ContentTypeID=1Mon, 07 Mar 2011 16:02:16 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:2a51f4dd-5a9b-48d1-ae3e-94911612235eGillian Mostyn<p>oral zolcal-D ???? (made by vetark).</p><div style="clear:both;"></div>