That didn't happen for me, and Fredd reported that he had to increase his dosage. One would think it could, or should happen, but I assume it depends on whether you have low thyroid due to autoimmune or something else.
Hypo- and hyper- thyroid symptoms have some overlap with methylation symptoms (i.e., exhaustion, anxiety, ear ringing, etc), so you want to keep on top of what your levels are and get tested if you are unsure. You can get a TSH test through
Life Extension for $30 - $40 if your doctor doesn't give you a test.