Metformin creatinine

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    Metformin creatinine


    Metformin is considered the first-line antihyperglycemic therapy for type 2 diabetes, but should be used with caution in people with renal insufficiency. Our study objective was to describe the proportion of patients who have an assessment of kidney function (serum creatinine [SCr] and estimated glomerular filtration rate [e GFR]) around the time of initiation of metformin in new users. We used data from the Alberta Kidney Disease Network to identify patients with diabetes (age, ≥66 y) with a new prescription for metformin from November 1, 2002, to March 31, 2008. We assessed whether SCr measurement was completed before and after metformin initiation. The e GFR was calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation and categorized into CKD stages. Frequency of metformin use based on SCr measurement and CKD stage was reported using descriptive statistics. A total of 22 051 subjects were identified as new metformin users. Given its favorable effects on serum lipids, obese body habitus, cardiovascular disease, and mortality, metformin is recommended as the first-line pharmacologic agent for type 2 diabetes in the absence of contraindications. Rhee Harold Simmons Center for Kidney Disease Research and Epidemiology Division of Nephrology and Hypertension, University of California Irvine School of Medicine, 101 The City Drive South, City Tower, Orange, CA 92868-3217 (USA)E-Mail [email protected] other biguanide agents, metformin is an anti-hyperglycemic agent with lower tendency towards hypoglycemia compared to other anti-diabetic drugs. However, as metformin accumulation may lead to type B non-hypoxemic lactic acidosis, especially in the setting of kidney injury, chronic kidney disease, and overdose, regulatory agencies such as the United States Food and Drug Administration (FDA) have maintained certain restrictions regarding its use in kidney dysfunction. Case series have demonstrated a high fatality rate with metformin-associated lactic acidosis (MALA), and the real-life incidence of MALA may be underestimated by observational studies and clinical trials that have excluded patients with moderate-to-advanced kidney dysfunction. A recent study of advanced diabetic kidney disease patients in Taiwan in Lancet Endocrinology and Diabetes has provided unique insight into the potential consequences of unrestricted metformin use, including a 35% higher adjusted mortality risk that was dose-dependent. This timely study, as well as historical data documenting the toxicities of other biguanides, phenformin and buformin, suggest that the recent relaxation of FDA recommendations to expand metformin use in patients with kidney dysfunction (i.e., those with estimated glomerular filtration rates ≥30 instead of our recommended ≥45 ml/min/1.73 m) may be too liberal. In this article, we will review the history of metformin use; its pharmacology, mechanism of action, and potential toxicities; and policy-level changes in its use over time. Karger AG, Basel Drug regulatory agencies play a key role in protecting and promoting public health through the rigorous regulation and supervision of various medications.

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    The use of metformin is contraindicated in men and women with serum creatinine concentrations of 1.5 mg/dL or higher and 1.4 mg/dL or higher, respectively. Fortunately, the risk for lactic acidosis with metformin has been very low since. Metformin is contraindicated in men who have a serum creatinine of at least 1.4. Albeit controversial, metformin thus is listed as being contraindicated in patients with impaired kidney function creatinine clearance CrCl 60 mL/min/1.73 m2.

    The FDA has required labeling changes that replace serum creatinine (SCr) with estimated glomerular filtration rate (e GFR) as the parameter used to determine the appropriateness of treatment with the biguanide metformin (, and others) in patients with renal impairment. These changes will allow more patients with mild to moderate renal impairment to receive metformin, which is generally the first drug prescribed for treatment of type 2 diabetes. Metformin was previously contraindicated in women with a SCr level ≥1.4 mg/d L and in men with a SCr level ≥1.5 mg/d L, but use of SCr as a surrogate indicator tends to underestimate renal function in certain populations (e.g., younger patients, men, black patients, patients with greater muscle mass). The calculation of e GFR takes into account age, race, and sex, as well as SCr level, providing a more accurate assessment of kidney function. A literature review summarized in an FDA Drug Safety Communication concluded that, based on e GFR, metformin is safe to use in patients with mild renal impairment and in some patients with moderate renal impairment.1The e GFR should be calculated before patients begin treatment with metformin and at least annually thereafter. Metformin is now contraindicated in patients with an e GFR in a patient already taking metformin, the benefits and risks of continuing treatment should be assessed. The FDA has issued new guidance for the use of the first-line diabetes drug metformin in patients with renal impairment. Metformin was approved by the FDA in 1994 for the management of type 2 diabetes. Since its approval, its labeling has warned of a contraindication in elevated serum creatinine ( Other risk factors for lactic acidosis include contrast dye exposure within 48 hours, chronic or excessive alcohol intake, dehydration, sepsis, acute congestive heart failure, and age. This absolute contraindication was based on clinical trials of an older biguanide called phenformin, which showed a greater risk of lactic acidosis associated with significant mortality and was subsequently pulled off the market in 1977. Although phenformin is no longer available in the United States, it’s still available in European and South American markets. Notably, the incidence of lactic acidosis associated with metformin is as low as 0.03 cases per 1000 patient-years. The FDA reviewed several studies to determine whether patients with mild to moderate renal impairment could safely continue on metformin to manage their type 2 diabetes.

    Metformin creatinine

    FDA Drug Safety Communication FDA revises warnings regarding., Metformin use in kidney disease - Healio

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  6. Also patients with an abnormal creatinine clearance ~ 60-70 ml/min. Hemodialysis Metformin use is contraindicated. References National Institutes of Health, U. S.

    • Metformin - GlobalRPH.
    • Assessment of Serum Creatinine and Kidney Function among..
    • FDA Metformin Safe for Some Patients With Renal Problems.

    Apr 25, 2016. The FDA has required labeling changes that replace serum creatinine SCr with estimated glomerular filtration rate eGFR as the parameter. Apr 14, 2016. FDA Revises Recommendation for Metformin Use in Patients With Chronic. The prior label restricted its use to men with serum creatinine 1.5. They note that any specific value of serum creatinine concentration chosen as a cut-off point for prescribing metformin will be arbitrary because of variations in muscle mass and protein turnover. Despite this they then select—for undefined reasons—a serum creatinine value of 150 μmol/l as the cut-off point in their guideline.

     
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