Aldactone is known to cause digestive, blood and metabolic disorders. It may lead to inflammation of the stomach, ulcers, diarrhea, vomiting and cramps. Metabolic disorders include hyperkalemia. In some cases, Aldactone may lead to headache, drowsiness and mental confusion and in rare cases to liver toxicity and renal failure. Buy Aldactone online with awareness of these side effects but still be sure that you take it only after consultation with your local doctor. If you are taking a cardiac stimulant like Digoxin there is a need to adjust its dosage to avoid greater risks. Aldactone is contraindicated in patients with impaired renal functions, inability to urinate and hyperkalemia.