In September 2009 I was diagnosed with an underactive thyroid. I started on 50mg of Levothroxine (which has been increased up to 100mg). The first couple of months were hell - alternating diarrhoea/constipation - panic attacks and depression (I am on Sexorat and had to change the time I took it) and horrendous period cramps. Two years letter I still suffering with diarrhoea/constipation - I am now sensitive to diary products, wheat and starchy food such as rice/potatoes - an because of the cramps I am only eating a meal once a day. I have regular blood checks and levels seem ok - however as regards my stomach problems I have been referred to scans for bowel/ovarian cancer - all clear. Now my doctor has suggested that I stop taking levothyroxine for two weeks to see if the stomach problems resolve themselves that way. I am slightly surprised and am wondering if anyone else had experienced the same symptoms/advise?