<s>[INST] I suffer from nausea roughly every 4-6 wks where I pass out and sometimes empty my bowel at the same time. I do not get any warning just an overall feeling I am going to be sick. I am taking Candesarten 16mg for raised blood pressure and levothyroxine 100mcgs for underactive thyroid. I am 52 generally fit and well and active, work fulltime.Any ideas what this could mean. [/INST] get your serum potassium level checked as candesarten causes potassium retention which may lead to nausea, vomitting and diarrhoea. fainting is another side effect of it. you should consult your physician and might need to change or reduce the dose of candesarten. </s>