Does Thyroxine Cause Constipation?

Low thyroid hormone levels (T4 and T3) slow all of your body systems, including gastric motility, leading to constipation.

Does levothyroxine make you constipated?

It comes with serious risks if you don't take it as prescribed. If you stop taking the drug or don't take it at all: Your thyroid hormones will remain low, which may result in low energy levels, tiredness, weakness, slower speech, constipation, or thickened skin.

Can your thyroid affect your bowel movements?

An overactive thyroid speeds up bodily systems, including digestion. You may notice more frequent bowel movements or even diarrhea.