Synthroid Side Effects: i started on synthroid around nov '05, 1 pill daily. had blood le http://www.medications.com/effect/view/14359 i started on synthroid around nov '05, 1 pill daily. had blood levels checked in january, dr. doubled dose. started experiencing stomach bloating shortly after, as well as some abdominal pain (which i think is from the bloating). a few days ago, i stopped i had bloating and a lot of gas. I took a bowel softerner and gas Mon, 16 Mar 2009 19:20:59 -0400 http://www.medications.com/effect/view/14359?item=18088 i had bloating and a lot of gas. I took a bowel softerner and gas x and it helped relieve the pressure. http://www.medications.com/effect/view/14359?item=18088