Every medicine will have adverse effects. After taking olmesartan, you may feel dizzy, or you will have a headache or flu-like symptoms, or pain in your back, bones or joints. What’s more, olmesartan will probably make you feel sick (nausea), stomachache or indigestion. These are all common side effects and the probability of these effects happening is more than 1 percent.
However, very few people may have the following serious side effects such as blood in your pee, feeling itching, a rash or lumps on your skin, severe diarrhoea and so on. In this way, you must go to doctor right away.