Final answer:
A rapid or irregular heart rate is a contraindication for oral and IV potassium.
Step-by-step explanation:
The correct statement concerning giving IV or PO potassium chloride to a patient on a loop diuretic is that a rapid or irregular heart rate is a contraindication for oral and IV potassium. It is important to monitor the heart rate before administering potassium as it can cause cardiac arrhythmias. Potassium should not be given rapidly and undiluted as it can cause adverse effects, such as tissue irritation or even cardiac arrest.
Learn more about Administering potassium to patients on loop diuretics