First of all, if you're having thyroid problems, then your weight is the least of your worries. I mean honestly, it's quite possibly the dumbest thing in the world to stop taking a medication for vanity. As for whether the the medication is causing her to gain weight or not, that depends on the medication itself. You would have to provide us with the name of the specific name of the medication. Lastly, "to some one like the side effects of it" makes no sense grammatically so I have no idea what on Earth you are asking.
ok it is synthroid or levothyroxin is the name 150 mgs i am asking if she stops taking it would there be anything wrong with her like would she go into coma or would it kill her also when she is taking it would that medicine its self cause her to gain weight so is that one side effect of taking that medicine.
You said 100mg in your original post, so which is it? 50 mg is a big difference when it comes to medication. As for what will happen if she stops taking it, well it depends on why she's taking these medications. What's wrong with her thyroid?
As for the weight gain, well a lot of people have had weight gain on synthroid, however it's generally not associated with weight gain. So the bottom line is people have started on synthroid, gained weight, and then blamed the synthroid, however that's not the actual cause.