It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and to decide if you should continue to take it. Blood and urine tests may be needed to check for unwanted effects.
Do not take other medicines unless they have been discussed with your doctor. This especially includes potassium supplements or salt substitutes containing potassium, or similar medicines, such as amiloride (Midamor®, Moduretic®), triamterene (Dyazide®, Dyrenium®, Maxzide®), or other products containing spironolactone (Aldactazide®).
This medicine may increase the amount of potassium in your blood (hyperkalemia). Check with your doctor right away if you are having abdominal or stomach pain, confusion, difficulty with breathing, irregular heartbeat, nausea or vomiting, nervousness, numbness or tingling in the hands, feet, or lips, shortness of breath, or weakness or heaviness of the legs.
Check with your doctor right away if you become sick while taking this medicine, especially with severe or continuing nausea, vomiting, or diarrhea. These conditions may cause you to lose too much water or salt.
Check with your doctor right away if you experience dizziness, fainting, confusion, muscle pain, weakness, and/or a fast heartbeat. Use extra care if you exercise or if the weather is hot. Heavy sweating can cause dehydration (loss of too much water) or electrolyte imbalances (loss of sodium, potassium, or magnesium in the body).
This medicine may cause swelling of the breasts (gynecomastia) and breast pain in some patients. If you have questions about this, talk to your doctor.