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The management of type 1 diabetes mellitus entails replacing the actions of the beta cells of the pancreatic islet to detect the need for insulin and to have insulin administered according to the requirements of the patient's body. This activity reviews the indications for the use of insulin, its mechanism of action, routes of administration, contraindications, adverse effects, monitoring its blood concentrations, and toxicity. It also describes in detail how insulin leads to shifts of electrolytes between the intracellular and extracellular compartments. Also, this activity summarizes the cellular production of insulin and its function via its receptor and the numerous effects on carbohydrate, protein, and fat metabolism. Objectives: Describe the action of insulin on glucose metabolism. Review the synthesis of insulin in pancreatic beta cells. Outline the relationship between insulin and potassium and its importance in the management of patients with diabetic ketoacidosis. Summarize interprofessional team strategies for improving care coordination and communication about the use of insulin to enhance outcomes for patients affected by diabetes mellitus. Access free multiple choice questions on this topic.

Insulin overdose can cause toxicity by causing hypoglycemia and many additional effects, including arrhythmias, coma, seizures, hypotension, amongst other symptoms. Long-term insulin use may lead to dermal toxicity by causing lipodystrophy. The patient can mitigate this adverse effect by rotating subcutaneous injection sites. Insulin can also cause hypokalemia and related complications, as mentioned earlier in this article.

To enhance patient health outcomes by the healthcare teams, medical education and dissemination of information regarding diabetes mellitus, its complications, and management options are crucial for patient care. All interprofessional healthcare team members (clinicians, pharmacists, nurses) must be mindful of the potential complications as well as how to manage hypoglycemia, hypokalemia, and other complications of insulin pharmacotherapy. All interprofessional team members should assist in educating the patient and family about the importance of safe insulin dosing. Demonstrations and educational workshops would go a long way toward achieving these goals. It is also crucial to educate the patient to recognize the early signs of hypoglycemia and how to manage diabetes mellitus with insulin and other glycemic control medications. This approach allows the patient to become an integral member of the healthcare team, i.e., its number one focus, and to help in improving overall outcomes by close collaboration. Nursing should ensure proper administration, adherence, and verify monitoring. Pharmacists need to verify dosing, perform medication reconciliation, and instruct patients on administration and how to use their glucose monitor properly. If there are concerns, they should work with the clinician to improve the safe administration of the drug. Monitoring of the blood glucose concentrations, adjusting the dose of insulin as necessary, and lifestyle modifications to prevent chronic complications of diabetes mellitus are significant goals to enhance the patient health outcomes by the healthcare team. [Level 5]