irritable bowel syndrome
"I'm a 70 year old woman who was prescribed Amitiza by my primary care physician for IBS with constipation. I was given the standard dose of 8mcg, to be taken twice daily.  Initially, the medication worked without incident, but about a month after I started taking the medication, I started having too frequent bowel movements and anxiety.  I also started losing weight which made me happy because I was about 20 pounds overweight, that is, until I saw my endocrinologist for my regular checkup. The blood work I had showed that I developed a hyperactive thyroid, which was why I was losing weight. This also me wonder if the Amitiza CAUSED the hyperthyroidism.  I don't think I'll ever find that out, but I had to stop taking Amitiza."