What are the side effects of Spironolactone?

Common side effects of Spironolactone include:

• Vomiting, diarrhea, and stomach pain or cramps
• Dry mouth and thirst
• Dizziness, unsteadiness, and headache
• Gynecomastia (enlarged breast tissue) in men, and breast pain in women
• Irregular menstrual periods and post-menopausal vaginal bleeding
• Erectile dysfunction
• Deepening of the voice and increased hair growth
• Drowsiness, tiredness, and restlessness

Severe side effects of Spironolactone include:

• Muscle pain or weakness
• Numbness or tingling
• Paralysis in the arms or legs
• Arrhythmia
• Confusion, extreme tiredness, and fainting
• Unusual bleeding or bruising
• Life-threatening skin reactions
• Flu-like symptoms, pain in the upper right abdomen, loss of appetite, vomiting blood, or bloody stools
• Difficulty breathing or swallowing
• Decreased urination

Spironolactone has been found to cause tumor development in rats. As a result, the drug carries a black-box warning for tumor risk. Consult your physician or pharmacist for more detailed information on this medication.