Spironolactone 25mg Tablets

Spironolactone is a competitive antagonist of aldosterone at the mineralocorticoid receptors in the distal renal tubules, collecting ducts, and other target organs. By blocking aldosterone, it increases sodium and water excretion while conserving potassium and hydrogen ions. This action reduces extracellular fluid volume and blood pressure, and in heart failure, it reduces cardiac remodeling and fibrosis.

Urgent Side Effects: Seek Medical Help Right Away

Although rare, this medication can cause severe and potentially life-threatening side effects. If you experience any of the following symptoms, contact your doctor or seek medical attention immediately:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of fluid and electrolyte problems, including:
+ Mood changes
+ Confusion
+ Muscle pain or weakness
+ Fast or abnormal heartbeat
+ Severe dizziness or passing out
+ Increased thirst
+ Seizures
+ Feeling very tired or weak
+ Decreased appetite
+ Unable to pass urine or changes in urine production
+ Dry mouth
+ Dry eyes
+ Severe upset stomach or vomiting
Signs of kidney problems, such as:
+ Unable to pass urine
+ Changes in urine production
+ Blood in the urine
+ Sudden weight gain
Severe dizziness or passing out
Confusion
Changes in balance
Decreased interest in sex
Erectile dysfunction
Fever, chills, or sore throat
Unexplained bruising or bleeding
Black, tarry, or bloody stools
Vomiting blood or coffee ground-like material
Changes in menstrual period
Breast pain
Enlarged breasts in males
Signs of liver problems, including:
+ Dark urine
+ Tiredness
+ Decreased appetite
+ Upset stomach or stomach pain
+ Light-colored stools
+ Vomiting
+ Yellow skin or eyes (one reported death has been associated with this medication)
Severe skin reactions, including Stevens-Johnson syndrome (SJS), which can be life-threatening. Seek medical help immediately if you experience:
+ Red, swollen, blistered, or peeling skin
+ Red or irritated eyes
+ Sores in the mouth, throat, nose, eyes, genitals, or skin
+ Fever
+ Chills
+ Body aches
+ Shortness of breath
+ Swollen glands

Other Possible Side Effects

Like all medications, this drug can cause side effects. While many people may not experience any side effects or only minor ones, it's essential to discuss any concerns with your doctor. If you experience any of the following side effects, contact your doctor or seek medical attention:

Dizziness or drowsiness
Headache
Diarrhea
Upset stomach or vomiting
Stomach cramps
* Hair loss

Reporting Side Effects

This list is not exhaustive, and you may experience other side effects. If you have questions or concerns, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the symptoms you experienced.
Certain medical conditions, including Addison's disease or high potassium levels.
If you are currently taking any of the following medications: abiraterone, amiloride, eplerenone, or triamterene. Please note that this is not an exhaustive list of interacting drugs.

To ensure your safety, it is crucial to provide your doctor and pharmacist with a comprehensive list of all your medications, including:

Prescription and over-the-counter (OTC) drugs
Natural products
Vitamins

Additionally, inform them about any existing health problems. This information will help your doctor determine whether it is safe for you to take this medication in conjunction with your other medications and health conditions.

Remember, do not start, stop, or modify the dosage of any medication without first consulting your doctor.

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Before engaging in activities that require alertness, such as driving, wait until you understand how this drug affects you.

Regularly monitor your blood pressure as directed by your healthcare provider. Additionally, undergo blood tests as scheduled by your doctor and discuss the results with them.

Be aware that this medication may interfere with certain laboratory tests. Therefore, notify all your healthcare providers and laboratory personnel that you are taking this drug.

If you are following a low-salt or salt-free diet, consult with your doctor to ensure safe management of your condition.

This medication may cause an increase in potassium levels in the blood, which can be life-threatening if left untreated. Individuals with diabetes, kidney disease, severe illness, or older adults are at a higher risk. Your doctor will closely monitor you and adjust the dosage as necessary to minimize this risk.

If you are using a salt substitute containing potassium, a potassium-sparing diuretic, or a potassium product, discuss this with your doctor to avoid potential interactions.

Before consuming alcohol, marijuana, or other forms of cannabis, or taking prescription or over-the-counter drugs that may cause drowsiness, consult with your doctor.

If you have diabetes, it is crucial to closely monitor your blood sugar levels while taking this medication.

If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor to discuss the potential benefits and risks of this medication to both you and your baby.

• Eplerenone (increased risk of hyperkalemia)
• Amiloride, Triamterene (other potassium-sparing diuretics - severe hyperkalemia risk)
• Potassium supplements (severe hyperkalemia risk)
• Potassium-containing salt substitutes (severe hyperkalemia risk)

• ACE inhibitors (e.g., lisinopril, enalapril) - increased risk of hyperkalemia
• Angiotensin Receptor Blockers (ARBs) (e.g., valsartan, losartan) - increased risk of hyperkalemia
• NSAIDs (e.g., ibuprofen, naproxen) - reduced diuretic/antihypertensive effect, increased risk of hyperkalemia and renal impairment
• Trimethoprim/sulfamethoxazole (Bactrim) - increased risk of severe hyperkalemia
• Digoxin - spironolactone may increase digoxin levels (monitor digoxin levels)
• Lithium - spironolactone may reduce renal clearance of lithium, leading to increased lithium toxicity (monitor lithium levels)

• Corticosteroids (e.g., prednisone) - enhanced electrolyte depletion (hypokalemia, hypomagnesemia)
• Alcohol, barbiturates, narcotics - enhanced orthostatic hypotension
• Cholestyramine - may cause hyperchloremic metabolic acidosis
• Abiraterone - increased exposure of abiraterone (monitor for toxicity)

• Carbenoxolone - may cause sodium retention and edema, counteracting spironolactone's effect

• Signs of hyperkalemia (muscle weakness, fatigue, bradycardia, paresthesias)
• Signs of hyponatremia (nausea, headache, confusion, seizures)
• Signs of dehydration/hypovolemia (dizziness, lightheadedness, dry mouth, decreased urination)
• Gynecomastia or breast tenderness (in males)
• Menstrual irregularities or hirsutism (in females)
• Gastrointestinal upset (nausea, vomiting, diarrhea)
• Rash

Spironolactone is classified as Pregnancy Category D. There is evidence of fetal risk based on human experience, but potential benefits may warrant use in pregnant women despite potential risks (e.g., for severe heart failure). It crosses the placenta. Use only if the potential benefit justifies the potential risk to the fetus.

Spironolactone's active metabolite, canrenone, is excreted in breast milk. Due to the potential for serious adverse reactions in the nursing infant (e.g., electrolyte disturbances, endocrine effects), a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother. Lactation Risk Category L3 (Moderately Safe).

Used in pediatric patients for heart failure, edema, and hypertension, typically at lower doses per kg body weight. Close monitoring of electrolytes (especially potassium) and renal function is crucial due to higher risk of imbalances. Safety and efficacy in neonates are not well-established.

Elderly patients are at increased risk of hyperkalemia, hyponatremia, and renal impairment due to age-related decline in renal function and polypharmacy. Initiate with lower doses and monitor electrolytes and renal function more frequently. Avoid in elderly patients with significant renal impairment.

• Spironolactone's diuretic and antihypertensive effects are often delayed, taking several days to weeks for full onset due to its mechanism of action (aldosterone antagonism).
• The most significant adverse effect is hyperkalemia, especially when co-administered with ACE inhibitors, ARBs, NSAIDs, or potassium supplements, or in patients with renal impairment.
• Gynecomastia (breast enlargement in males) is a common and dose-dependent side effect, often leading to discontinuation. It is usually reversible upon discontinuation but can be persistent in some cases.
• Take with food to enhance absorption and reduce gastrointestinal upset.
• Monitor potassium levels closely, especially during initiation, dose changes, and with concomitant medications that affect potassium.
• Consider alternative potassium-sparing diuretics (e.g., eplerenone) if gynecomastia is problematic, as eplerenone has higher selectivity for the mineralocorticoid receptor and less affinity for androgen/progesterone receptors.

• Eplerenone (selective aldosterone antagonist, less gynecomastia)
• Other potassium-sparing diuretics (e.g., amiloride, triamterene - often combined with thiazides)
• Loop diuretics (e.g., furosemide, torsemide - for more potent diuresis, but cause potassium loss)
• Thiazide diuretics (e.g., hydrochlorothiazide, chlorthalidone - for hypertension and mild edema, cause potassium loss)
• ACE inhibitors/ARBs (for heart failure, hypertension, but also increase potassium)
• Beta-blockers (for heart failure, hypertension)
• Calcium channel blockers (for hypertension)

If your symptoms or health issues persist or worsen, it's essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so be sure to check with your pharmacist for more information. If you have any questions or concerns about this medication, don't hesitate to reach out to your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide details about the overdose, including the medication taken, the amount, and the time it occurred.