Azilsartan: A Comprehensive Drug Profile

What is Azilsartan?

Azilsartan is a prescription medication belonging to a class of drugs called angiotensin receptor blockers (ARBs). It is primarily used to treat high blood pressure (hypertension) in adults by helping blood vessels relax and widen. This medication is typically prescribed when lifestyle changes alone are not sufficient to control blood pressure levels.

Uses

Azilsartan has several documented medical uses:

• Primary hypertension: The main indication for treating high blood pressure in adults when no underlying cause is identified
• Cardiovascular risk reduction: Lowering blood pressure helps reduce the risk of heart attack, stroke, and other cardiovascular events
• Combination therapy: Often used alongside other blood pressure medications like diuretics or calcium channel blockers for enhanced blood pressure control
• Hypertension in diabetic patients: Particularly beneficial for patients with both diabetes and high blood pressure due to its kidney-protective effects
• Long-term blood pressure management: Provides sustained blood pressure control with once-daily dosing for improved patient compliance

How it works

Azilsartan works by blocking angiotensin II receptors in blood vessels and other tissues. Angiotensin II is a hormone that causes blood vessels to narrow and triggers the release of another hormone that increases blood volume. By preventing angiotensin II from binding to its receptors, azilsartan allows blood vessels to remain relaxed and dilated, which lowers blood pressure and reduces the workload on the heart.

Side effects

Common side effects include:

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• Dizziness or lightheadedness
• Fatigue or weakness
• Diarrhea
• Cough
• Back pain
• Headache
• Nausea
• Upper respiratory tract infections

Serious side effects to watch for:

• Severe kidney problems or kidney failure
• Extremely low blood pressure (hypotension)
• High potassium levels in the blood (hyperkalemia)
• Severe allergic reactions including swelling of face, lips, or throat
• Liver problems indicated by yellowing of skin or eyes

Warnings and precautions

• Pregnancy: Azilsartan should not be used during pregnancy, especially in the second and third trimesters, as it can cause serious harm to the developing fetus including kidney problems and death
• Kidney disease: Patients with severe kidney impairment or those on dialysis should use this medication with extreme caution and require close monitoring
• Liver problems: Individuals with severe liver disease may need dosage adjustments or alternative treatments
• Dehydration: Patients who are dehydrated or have low blood volume are at increased risk of experiencing dangerously low blood pressure
• Heart problems: Those with severe heart failure or aortic stenosis should be monitored closely when starting treatment

Interactions

Azilsartan can interact with several medications and supplements:

• ACE inhibitors: Combining with these blood pressure medications can increase the risk of kidney problems and high potassium levels
• Potassium supplements: May lead to dangerously high potassium levels in the blood
• Lithium: Azilsartan can increase lithium levels in the blood, potentially causing toxicity
• NSAIDs: Pain relievers like ibuprofen can reduce the blood pressure-lowering effects and increase kidney damage risk
• Diuretics: Water pills can enhance blood pressure reduction but may cause excessive lowering in some patients
• Salt substitutes containing potassium: Can contribute to elevated potassium levels when used together
• Diabetes medications: May enhance blood sugar-lowering effects requiring dose adjustments
• Alcohol: Can amplify the blood pressure-lowering effects leading to dizziness and falls

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Dosage

The typical starting dose of azilsartan for adults is 40 mg taken once daily. Depending on blood pressure response, the dose may be increased to a maximum of 80 mg once daily. For patients who are elderly, have kidney problems, or are taking diuretics, a lower starting dose of 20 mg daily may be recommended. The medication can be taken with or without food, and should be taken at the same time each day for optimal effectiveness. All dosage decisions should be made by a healthcare provider based on individual patient factors and blood pressure goals.

Sources: FDA DailyMed drug labels (public domain), BNF, WHO Essential Medicines List. This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before starting or stopping any medication.

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