Common side effects of Aldactone include:
- skin rash
- headache
- dizziness
- nausea
- vomiting
- gas
- stomach pain
If these persist or worsen, consult with a doctor or pharmacist.
There are rare but potentially serious side effects of Aldactone, including irregular heart rate, muscle pain or weakness, urinating less than usual, shallow breathing, tremors, confusion, or a severe skin reaction, hyperkalemia (high levels of potassium in the blood), and numbness. Consult with a doctor immediately or go directly to an emergency room.