Spironolactone

Spironolactone is a prescription medication that blocks the effects of a hormone called aldosterone. Your body makes aldosterone to control sodium and water balance. This medication was originally developed to treat heart and blood pressure problems. Doctors now prescribe it for several conditions including hormone-related issues.

The medication comes in tablet form and belongs to a class of drugs called potassium-sparing diuretics. That means it helps your body remove extra fluid without losing too much potassium. Unlike other diuretics, spironolactone actually helps your body hold onto potassium. This makes it unique among water pills.

Spironolactone also blocks testosterone and similar hormones in your body. This property makes it useful for treating hormonal acne and excess hair growth in women. Many dermatologists prescribe it when other acne treatments have not worked. Your doctor will determine if this medication is right for your specific condition.

• Heart failure to reduce fluid buildup and improve symptoms
• High blood pressure, often combined with other medications
• Edema caused by liver disease or kidney problems
• Primary hyperaldosteronism, a condition where your body makes too much aldosterone
• Hormonal acne in adult women
• Polycystic ovary syndrome to manage symptoms like acne and excess hair
• Excess facial or body hair growth in women
• Female pattern hair loss

Spironolactone works by blocking aldosterone receptors in your kidneys. When aldosterone binds to these receptors, it tells your kidneys to hold onto sodium and water while releasing potassium. By blocking this signal, spironolactone does the opposite. It helps your kidneys release sodium and water while keeping potassium. This reduces fluid buildup and lowers blood pressure.

The medication also blocks androgen receptors throughout your body. Androgens are male hormones like testosterone that exist in both men and women. In women with high androgen levels, blocking these receptors can reduce acne, unwanted hair growth, and scalp hair loss. This effect usually takes 3 to 6 months to become noticeable. The hormone-blocking effect happens at the same doses used for heart and blood pressure conditions.

Typical doses range from 25 mg to 200 mg per day taken by mouth. For heart failure, doctors often start with 25 mg once daily. For high blood pressure, the starting dose is usually 25 mg to 50 mg daily. For hormonal conditions like acne, doses typically range from 50 mg to 100 mg daily. Your doctor will determine your specific dose based on your condition and how you respond. Some people take the full dose once daily while others split it into two doses. Your doctor may adjust your dose over time based on blood test results and symptoms. Never change your dose without talking to your doctor first.

• High potassium levels, which can be dangerous
• Dizziness or lightheadedness, especially when standing up
• Increased urination, particularly when starting treatment
• Breast tenderness or enlargement in both men and women
• Irregular menstrual periods or spotting
• Fatigue or drowsiness
• Nausea or upset stomach
• Headache
• Leg cramps

Serious side effects require immediate medical attention. These include signs of high potassium such as irregular heartbeat, muscle weakness, or tingling sensations. Seek help if you experience severe dizziness, fainting, or difficulty breathing. Contact your doctor if you develop unusual bleeding or bruising. Severe stomach pain or persistent vomiting also warrant immediate evaluation. This medication can cause serious electrolyte imbalances that need monitoring.

• Potassium supplements or salt substitutes containing potassium can cause dangerous potassium levels
• ACE inhibitors like lisinopril or enalapril increase potassium retention
• ARBs such as losartan or valsartan also raise potassium levels
• NSAIDs like ibuprofen or naproxen can reduce effectiveness and increase potassium
• Lithium levels may increase, requiring dose adjustments
• Other blood pressure medications may cause excessive blood pressure lowering
• Digoxin levels can be affected, requiring monitoring
• Trimethoprim antibiotics increase potassium levels
• Heparin raises potassium and should be used cautiously together

Your doctor will order blood tests to check your potassium levels regularly while you take spironolactone. High potassium is the most important safety concern with this medication. Most doctors check potassium levels within the first week of starting treatment, then again at 4 weeks. After that, testing every 3 to 6 months is typical for stable patients. Your doctor will also monitor your kidney function through blood tests. Kidney problems can develop or worsen with this medication. Testosterone levels may be monitored if you take spironolactone for hormonal conditions. Some doctors also track sodium levels and overall electrolyte balance. More frequent testing may be needed if you take other medications that affect potassium or if you have kidney disease.