How does amiloride boost the risk of getting too much potassium?

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Amiloride is used to restore normal potassium levels in the bloodstream, so dosage and potassium levels must be carefully monitored for acceptable levels. If a patient has kidney issues or renal impairment, the risk of hyperkalemia (too much potassium) increases. Older patients, especially those with congestive heart failure or hypertension (high blood pressure) are at a greater risk of developing hyperkalemia when taking this medication.