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Loop diuretics are medications used in the management and treatment of fluid overload conditions such as heart failure, nephrotic syndrome or cirrhosis, and hypertension, in addition to edema. This activity reviews the indications, action, and contraindications for loop diuretics as a valuable agent in managing fluid overload and hypertension. This activity will highlight the mechanism of action, adverse event profile, and other key factors (e.g., off-label uses, dosing, pharmacodynamics, pharmacokinetics, monitoring, relevant interactions) pertinent for members of the interprofessional team in the management of patients with fluid overload and related conditions. Objectives: Identify the mechanism of action of loop diuretics. Describe the potential adverse effects of loop diuretics. Review types of loop diuretics and understand when to use which particular agent and which side effects belong to which drug. Explain the importance of improving care coordination amongst the interprofessional team to enhance care coordination for patients receiving loop diuretics. Access free multiple choice questions on this topic.

Diuretic toxicity can present in the form of electrolyte imbalances (hyponatremia, hypokalemia, hypocalcemia), acid/base disturbances (hypochloremic alkalosis), and dehydration secondary to excessive diuresis. Care is necessary to check electrolytes while the patient is on a diuretic periodically. Treatment would include rehydration, correction of the acid/base disturbance, and electrolyte replacement. If hypotension is unresolved, pressure support may be necessary.

Fluid overload states and alternative treatments of hypertension can be treated effectively with loop diuretic use. However, healthcare workers should be wary of their intended uses, side effect profiles, and contraindications. Caution is necessary when regulating which loop diuretic and the dosage chosen for the desired diuresis effect. Aggressive over diuresis can lead to dehydration, electrolyte imbalances, hypotension, and sudden cardiac arrhythmias in more severe cases. Clinicians should include periodic monitoring of blood pressures, fluid status (including weight), serum electrolytes, and renal function in continued diuretic treatments. Goals for diuresis should consist of dosage adjustments as patients progress with their response to the diuretics. Pharmacists should always verify the dosing of these and all drugs and perform medication reconciliation for drug-drug interactions. Healthcare workers are responsible for keeping up with current loop diuretic recommendations and providing safe practice to their patients. Nursing can monitor treatment compliance and verify therapy effectiveness as well as monitor for adverse drug reactions. Nursing and pharmacy will report all concerns to the physician and the rest of the interprofessional team, operating collaboratively to achieve optimal therapeutic results. Clinicians, pharmacists, and nurses all need to function as a cohesive interprofessional team when patients receive loop diuretics so therapeutic outcomes can be maximized while limiting or eliminating interactions and adverse effects. [Level 5]