PTU has to be weaned off according to levels.
If you stop cold turkey, you will go hyper again.
Usually starting dose is 30mg and then wean down by 5mg each time (usually every 2-3 weeks).
But this all depends on the FT3 and FT4.
Tell your Doc that TSH rising DOESNT mean you are NOT Hyper.
Ask your Doc to go by FREE T3 and FREE T4 and they are the main hormones that determine the dose of PTU.