Common side effects

• Viral infection
• Hyperkalemia
• Hypotension
• Arthralgia
• Back pain
• Dizziness
• Fatigue
• Headache disorder
• Diarrhea
• Acute abdominal pain
• Orthostatic hypotension
• Upper respiratory infection
• Kidney disease with reduction in GFR
• Cough
• Nausea
• Erectile dysfunction
• Vomiting

Tell your doctor right away if you have any serious side effects, including

• Fainting
• Symptoms of a high potassium blood level

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
• Severe dizziness
• Trouble breathing

Other things to note

• Dizziness or lightheadedness may occur as your body adjusts to the medication. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
• To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
• Although valsartan 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 valsartan. Tell your doctor right away if you have any signs of kidney problems such as a change in the amount of urine.