Riegger GA, Bouzo H, Petr P, et al, Improvement in Exercise Tolerance and Symptoms of Congestive Heart Failure During Treatment With Candesartan Cilexetil, Circulation, 1999, 100 22 :2224-30. This information is not intended as individual medical advice and does not substitute for the purchase generic candesartan online knowledge and judgment of your health care professional. MEq was observed in patients treated with ATACAND alone but was rarely of clinical importance. Candesartan is mainly excreted unchanged in urine and feces via bile. It may take to weeks of using this medicine before your blood pressure is under control. This is not complete list of side effects and others may occur. Candesartan may cause injury and even death to the unborn baby if you take it during the second and third trimesters of pregnancy.