Drug information provided by: IBM Micromedex
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 this medicine together with eplerenone (Inspra®). Using these medicines together may cause serious 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, certain diuretics (eg, amiloride, triamterene (Dyazide®, Dyrenium®, Maxzide®, Midamor®, Moduretic®), or other products containing spironolactone (Aldactazide®).
Hyperkalemia (high potassium in the blood) may occur while you are using this medicine. Check with your doctor right away if you have the following symptoms: stomach pain, confusion, difficulty with breathing, irregular heartbeat, nausea or vomiting, nervousness, numbness or tingling in the hands, feet, or lips, or weakness or heaviness of the legs. Ask your doctor before you use any medicine, supplement, or salt substitute that contains potassium.
Spironolactone may worsen kidney function in patients with low to no salt in their body or in those who take other blood pressure medicines (eg, ARB, ACE inhibitor). Talk to your doctor if you have concerns about this.
Dizziness, lightheadedness, or fainting may also occur, especially when you get up suddenly from a lying or sitting position. Do not drive or do anything else that could be dangerous until you know how this medicine affects you. If you feel dizzy, lie down so you do not faint. Then sit for a few moments before standing to prevent the dizziness from returning.
This medicine may also cause electrolyte imbalances (including low sodium, magnesium, and calcium in the blood, hypochloremic alkalosis) and an increase in your uric acid and blood sugar levels. Talk to your doctor if you have concerns.
Check with your doctor right away if you become sick while taking this medicine, especially if you have severe or continuing nausea, vomiting, or diarrhea that does not stop. These conditions may cause you to lose too much water or salt and may lead to low blood pressure. You can also lose water by sweating, so drink plenty of water during exercise or in hot weather.
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.
Make sure any doctor or dentist who treats you knows that you are using this medicine.