What are the main side effects of arbs?

Why? Most people have no side effects but some can have swelling of the lips/cough/dizziness/fatigue, and rarely people will have more serious side effects. I always tell my patients if they think they are having a side effect, call because not everyone reacts the same to medications. In general this is a class of anti-hypertension medications that are well tolerated, but everything needs monitoring.