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# Linagliptin ## Overview Linagliptin is an oral dipeptidyl peptidase-4 (DPP-4) inhibitor indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. ## Primary Indications Type 2 Diabetes Mellitus. ## Adult Dosing The usual dose is 5 mg orally once daily. ## Pediatric Dosing Linagliptin is not recommended for use in pediatric patients. ## Dose Adjustments No dose adjustment is required for patients with renal impairment or hepatic impairment. ## Contraindications * Known hypersensitivity to linagliptin. * History of angioedema related to DPP-4 inhibitor therapy. ## Adverse Effects The most common adverse effects include nasopharyngitis and upper respiratory tract infection. Serious adverse effects include: * Pancreatitis: Patients should be advised of the characteristic persistent abdominal pain, which may be severe and radiate to the back, with or without vomiting. * Hypoglycemia: Risk of hypoglycemia is increased when used in combination with a sulfonylurea or insulin. * Hypersensitivity reactions: Including rash, urticaria, and angioedema. * Severe and disabling arthralgia. ## Key Drug Interactions * **CYP3A4 Inhibitors/Inducers:** Linagliptin is minimally metabolized by CYP3A4. Strong inducers of CYP3A4 (e.g., rifampin) may reduce linagliptin efficacy; use with caution. * **Sulfonylureas and Insulin:** Concomitant use may increase the risk of hypoglycemia. Dose reduction of the sulfonylurea or insulin may be necessary. ## Monitoring * HbA1c: To assess glycemic control. * Renal function: Although no dose adjustment is needed, monitoring is generally recommended for diabetic patients. * Pancreatic enzyme levels: If pancreatitis is suspected. ## Clinical Pearls * Linagliptin is unique among DPP-4 inhibitors as it is primarily eliminated unchanged by the bile and gut, thus not requiring dose adjustment in patients with renal impairment. * It can be taken with or without food. * Consider the risks of pancreatitis and hypersensitivity reactions. *** *Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and local guidelines for complete details before making any treatment decisions.*