CG:
"Occasionally, hypothyroidism gets better without treatment. In general, however, the symptoms get progressively worse if it isn't treated.
Hypothyroidism can be treated with a thyroxine replacement medicine, called levothyroxine. This is taken as tablets and it can take some time to get the dose right. Usually you will start on a low dose that is gradually built up every few months. Your GP will adjust your dose according to the results of your blood tests.
Once the correct dose of levothyroxine has been established, you will usually have a thyroid function test every year to check the levels of your thyroid hormones.
You will usually feel much better once you're taking levothyroxine. Side-effects are unusual because a missing hormone is simply being replaced. However, if you take too much, you may develop symptoms of an overactive thyroid, such as anxiety and weight loss.
If you have subclinical hypothyroidism (which means you don't have any symptoms but your thyroid hormone levels are disrupted) you may not need any treatment at first. Your GP will usually monitor how your thyroid hormone levels change every few months. If you develop symptoms, your GP will suggest that you start treatment."
(taken from HERE )
i cant find a single fault with that bit of information having looked after a few people with under-active thyroids, levothyroxine is a very effective drug and not known anyone have prolems with it so far 😀
hope that helps!