Suspected Case of Olmesartan Causing Acute Severe Diarrhea

41 year old patient referred from clinic due to severe acutet watery diarrhea could not be resolved from conservative treatments. Patient was receiving olmesartan and atorvastatin for hypertension and hyperlipidemia. On admission, patient was treated for infectious gastrointestinal disorder was treated with antibiotic and anti-constipating medications. Physical examination and lab test were non-significant. Patient was switch from olmesartan to candesartan due to suspected adverse effect. Continuing infectious and symptomatic treatments, patient's symptoms start to resolves. Patient was discharged two days after discontinuing olmesartan. This case represent the only case of acute diarrhea associated with olmeartan.