Dizziness, tiredness, or lightheadedness may occur as your body adjusts to the medication. Runny nose or sore throat may also occur. If any of these effects persists or worsens, tell your doctor or pharmacist promptly.
Tell your doctor right away if you have any serious side effects, including: fainting, symptoms of a high potassium blood level (such as muscle weakness, slow/irregular heartbeat).
Although candesartan may be used to prevent kidney problems or treat people who have kidney problems, it may also rarely cause serious kidney problems or make them worse. Your doctor will check your kidney function while you are taking candesartan. Tell your doctor right away if you have any signs of kidney problems such as a change in the amount of urine.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.