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Contents
Common use
Diovan, containing the active substance valsartan, is a widely prescribed angiotensin II receptor blocker (ARB) used for managing high blood pressure, treating chronic heart failure, and increasing survival after heart attacks.
It functions by inhibiting the effects of angiotensin II, a hormone that tightens blood vessels. This relaxation effect lowers vascular resistance and eases the workload on the heart.
In addition to blood pressure control, Diovan may help slow the progression of kidney complications in patients with hypertension or diabetes.
Dosage and direction
Diovan is taken orally once or twice daily, with or without food. Dosage varies depending on the condition being treated.
For hypertension, most patients begin with 80-160 mg daily. For heart failure or after a heart attack, treatment often starts at 40 mg twice per day and may be adjusted gradually.
Always swallow the tablets whole with water, and take your doses at the same time each day for consistent blood levels.
Precautions
Before taking Diovan, inform your healthcare provider about any liver or kidney problems, dehydration, or abnormal electrolyte levels.
The medication may elevate potassium in the blood, especially when used with potassium supplements or diuretics. Avoid salt substitutes unless approved by your doctor.
Diovan must not be used during pregnancy, particularly in the second and third trimesters, as it can harm the unborn baby.
Dizziness or low blood pressure can occur, especially during the first few days or after increasing the dose.
Contraindications
You should not use Diovan if you are allergic to valsartan or any of its inactive ingredients.
The drug is contraindicated for use alongside aliskiren in individuals with diabetes or impaired kidney function.
People with severe liver disease should also avoid taking Diovan.
Possible side effects
Common side effects may include headaches, fatigue, upset stomach, and lightheadedness.
Less frequent but serious effects include:
Elevated potassium (e.g. muscle weakness, slow or irregular heartbeat)
Kidney issues (swelling, low urine output)
Allergic reactions like rash, itching, or facial swelling
Seek emergency care if you experience symptoms like fainting or severe shortness of breath.
Drug interactions
Diovan may interact with the following:
Other antihypertensive medications (especially ACE inhibitors)
Diuretics or potassium supplements
Nonsteroidal anti-inflammatory drugs (NSAIDs), which may impair kidney function
Lithium (risk of elevated serum lithium levels)
Share a full list of all medications and supplements with your doctor to avoid dangerous interactions.
Missed dose
If you forget to take Diovan, take it as soon as possible. If your next scheduled dose is close, skip the missed one and continue as normal. Never take a double dose.
Overdose
An overdose of valsartan may result in extreme lightheadedness, fainting, or abnormal heart rhythms.
If overdose is suspected, call poison control or seek immediate medical help.
Storage
Store Diovan at normal room temperature (20° - 25°C / 68° - 77°F), away from excess moisture, heat, and light.
Keep the medication in its original packaging and out of reach of pets and children.
U.S. Sale and Prescription Policy
In the U.S., Diovan is classified as a prescription-only medication and approved by the FDA for use in managing hypertension, heart failure, and post-heart attack recovery.
A valid prescription from a licensed medical professional is typically required to obtain Diovan from retail or online pharmacies. Generic valsartan is also widely available and usually covered by insurance plans.
Refills often require regular blood pressure checks, kidney function tests, and ongoing evaluation by a healthcare provider.
However, Frontier Family Pharmacy offers a legally approved channel for eligible patients to purchase Diovan without the need for a conventional prescription. This service operates under strict internal protocols and may not be available in all locations depending on state regulations.