While adverse reactions to Valsartan/HCTZ are uncommon, some patients who take the drug may experience mild side effects. The most common adverse effects of Valsartan and hydrochlorothiazide are dizziness or lightheadedness. These are normally mild and usually go away as your body adjusts to the medication. Let your doctor know you experience any severe side effects or if these don’t go away.
This medication can cause a loss of too much body water and electrolytes. Some symptoms of dehydration or mineral loss include extreme thirst, muscle cramps or weakness, very dry mouth, changes to your heartbeat, or confusion. Talk to your doctor right away if you experience any of these symptoms.
A very serious reaction is rare but can occur. Get immediate medical attention if you experience fainting, a decrease in vision, eye pain, symptoms of high potassium levels (muscle weakness or irregular heartbeat), signs of kidney problems or an allergic reaction (such as rash, hives, itching, swelling, difficulty breathing or swallowing).
Talk to your doctor about your medical history - particularly if you have or have had kidney or liver disease, lupus, gout, or skin cancer. Inform your doctor of all known allergies and of all medications and supplements that you take. Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding.
This is not a complete list of side effects or precautions. For more information please visit the National Institutes of Health’s DailyMed webpage for valsartan & hydrochlorothiazide.