Overactive Thyroid In Cats Thyroid Medication Costs?

Thyroid Medication Costs? - overactive thyroid in cats

Hello,

My cat was diagnosed with an overactive and need medication for 3 weeks to reconsider before the return. I do not think I have to take (need medication for the rest of his life, I had no insurance for pets) - if we know roughly how much does it cost per month? (Books English please). Thank you!