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Metformin AND B12

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https://www.readbyqxmd.com/read/29057189/prevalence-of-vitamin-b12-deficiency-in-patients-with-type-ii-diabetes-mellitus-on-metformin-a-study-from-khyber-pakhtunkhwa
#1
Adnan Khan, Ihtesham Shafiq, Mohammad Hassan Shah
Background Metformin is the most common oral hypoglycemic used and associated with certain abnormalities. The objective was to evaluate and define the occurrence and bases of vitamin B12 deficiency amongst patients on Metformin for diabetes mellitus type II. Methods A cross-sectional study was conducted on 209 patients having diabetes type II between January-December 2016. The patients aged > 45 years and who had taken metformin for at least three months were recruited with regular follow-up at the Endocrinology Unit of Hayatabad Medical Complex and Diabetic Center Hayatabad, Peshawar...
August 18, 2017: Curēus
https://www.readbyqxmd.com/read/28932240/perspectives-on-peripheral-neuropathy-as-a-consequence-of-metformin-induced-vitamin-b12-deficiency-in-t2dm
#2
REVIEW
Marwan A Ahmed, George L Muntingh, Paul Rheeder
Peripheral neuropathy (PN) is a primary complication of type 2 diabetes mellitus (T2DM) and a direct manifestation of vitamin B12 deficiency. Examining the effects of metformin use on PN status became imperative following clinical studies that showed the vitamin B12-lowering effect of the medication. The complexity of the topic and the inconsistency of the results warrant consideration of topic-specific perspectives for better understanding of the available evidence and more appropriate design of future studies...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28925645/vitamin-b12-deficiency-recognition-and-management
#3
Robert C Langan, Andrew J Goodbred
Vitamin B12 deficiency is a common cause of megaloblastic anemia, various neuropsychiatric symptoms, and other clinical manifestations. Screening average-risk adults for vitamin B12 deficiency is not recommended. Screening may be warranted in patients with one or more risk factors, such as gastric or small intestine resections, inflammatory bowel disease, use of metformin for more than four months, use of proton pump inhibitors or histamine H2 blockers for more than 12 months, vegans or strict vegetarians, and adults older than 75 years...
September 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/28904497/the-effect-of-metformin-treatment-on-the-serum-levels-of-homocysteine-folic-acid-and-vitamin-b12-in-patients-with-polycystic-ovary-syndrome
#4
Sedigheh Esmaeilzadeh, Maryam Gholinezhad-Chari, Reza Ghadimi
BACKGROUND AND OBJECTIVE: Hyperhomocysteinemia is a well-known risk factor for cardiovascular disease. Although metformin therapy can increase homocysteine (Hcy) levels, it frequently is used as an oral medicine in women with polycystic ovary syndrome (PCOS), who might be at risk of catching diabetes mellitus. The aim of this study was to investigate the effect of metformin on the levels of serum Hcy, vitamin B12 (vit B12), and folic acid in patients with PCOS. MATERIALS AND METHODS: An interventional study was designed with 18 patients with PCOS at the Fatemehzahra infertility Hospital in Babol, Iran...
April 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28882470/an-observational-study-of-vitamin-b12-levels-and-peripheral-neuropathy-profile-in-patients-of-diabetes-mellitus-on-metformin-therapy
#5
Kamesh Gupta, Anand Jain, Anurag Rohatgi
METHODS: A descriptive, observational study was completed in a tertiary care hospital between November 2014 and March 2016. Fifty consecutive patients of Type 2-Diabetes Mellitus who had been on metformin therapy for at least three months were included in our study. Several Parameters were compared with vitamin B12 levels and severity of peripheral neuropathy (using Toronto Clinical Scoring System (TCSS) and Nerve Conduction Velocity). These included the duration of diabetes, duration of metformin usage, dietary history, and HbA1c levels...
August 25, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28864375/metformin-use-and-vitamin-b12-deficiency-untangling-the-association
#6
René Rodríguez-Gutiérrez, Juan Montes-Villarreal, Karla Victoria Rodríguez-Velver, Camilo González-Velázquez, Alejandro Salcido-Montenegro, Anasofia Elizondo-Plazas, José Gerardo González-González
BACKGROUND: Current evidence linking vitamin B12 deficiency with metformin use is inconsistent. Hence, there is uncertainty regarding the diagnostic approach in this scenario. Furthermore, this possible association has not been studied in the complete spectrum of patients with diabetes. MATERIALS AND METHODS: We conducted a cross-sectional, controlled study with the objective of assessing differences in serum vitamin B12 levels among patients with and without diabetes with different metformin-treatment regimens...
August 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28807660/the-changing-cost-to-prevent-diabetes-a-retrospective-analysis-of-the-diabetes-prevention-program
#7
Nicholas W Carris, Feng Cheng, William N Kelly
OBJECTIVES: Diabetes prevention interventions are poorly implemented. While health care costs generally increase, 2 factors affect the relative cost of diabetes prevention interventions: the declining cost of metformin (even without insurance) and the new recommendation for vitamin B12 monitoring during metformin treatment. The study's objective was to update the relative health system cost estimate of metformin for diabetes prevention by incorporating the current health system cost of metformin and the cost of addressing potential metformin-associated vitamin B12 deficiency...
August 11, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28553599/serum-vitamin-b12-levels-in-type-2-diabetes-patients-on-metformin-compared-to-those-never-on-metformin-a-cross-sectional-study
#8
Nishant Raizada, Viveka P Jyotsna, Vishnubhatla Sreenivas, Nikhil Tandon
CONTEXT: There are limited data about the effect of metformin use on serum Vitamin B12 levels in type 2 diabetes patients from India. AIMS: We studied serum Vitamin B12 levels in patients with type 2 diabetes mellitus who were receiving metformin and compared them to those never treated with metformin. SUBJECTS AND METHODS: A total of 183 patients ("metformin" group 121, "no metformin" group 63) of type 2 diabetes from the endocrinology clinic of a tertiary care center in North India were studied...
May 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28496346/do-we-need-to-measure-vitamin-b12-and-magnesium-in-morbidly-obese-patients-with-type-2-diabetes-mellitus
#9
Anna Wåhlén, Arvo Haenni, Hans-Erik Johansson
OBJECTIVE: We aimed to investigate the prevalence of B12 deficiency in metformin-treated, morbidly obese, type 2 diabetes mellitus (T2DM) patients, compared to morbidly obese controls, as well as to evaluate the magnesium status. DESIGN: Retrospective cross-sectional analysis of plasma vitamin B12, plasma magnesium, glucometabolic status and clinical measurements in all consecutive morbidly obese patients was conducted during 1 year. SETTING: Outpatient Clinic of Obesity Care...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/28457771/-vitamin-b12-levels-in-the-patient-population-attending-an-urban-health-centre-in-madrid
#10
M Camarero-Shelly
INTRODUCTION: Vitamin B12 levels are usually measured in Primary Care when the patients have symptoms or risk factors associated with its deficiency, mostly in the elderly. However, no evidence has been found to support the recommendation of screening in the general population. The aim of this study is to assess the relevance of having extended the screening of vitamin B12 deficiency to a younger population, after observing an increase in the prescription of this injected vitamin in a population under 65 years, by analysing the vitamin B12 values obtained...
April 27, 2017: Semergen
https://www.readbyqxmd.com/read/28447237/effects-of-metformin-versus-placebo-on-vitamin-b12-metabolism-in-non-diabetic-breast-cancer-patients-in-cctg-ma-32
#11
Ana Elisa Lohmann, Mira F Liebman, William Brien, Wendy R Parulekar, Karen A Gelmon, Lois E Shepherd, Jennifer A Ligibel, Dawn L Hershman, Priya Rastogi, Ingrid A Mayer, Timothy J Hobday, Julie Lemieux, Alastair Mark Thompson, Kathleen I Pritchard, Timothy Joseph Whelan, Som D Mukherjee, Haji I Chalchal, Vanessa Bernstein, Vuk Stambolic, Bingshu E Chen, Pamela Jean Goodwin
BACKGROUND: Metformin is associated with low levels of vitamin B12 (VitB12) in patients with diabetes. The CCTG/MA.32 trial investigates the effects of metformin vs placebo on breast cancer (BC) outcomes in non-diabetic high-risk BC patients. We analyzed VitB12 at baseline and after 6 months of metformin (versus placebo) in the first 492 patients with paired blood samples. METHODS: VitB12 was analyzed centrally in baseline and 6-month fasting plasma. Levels <181 pmol/L were considered deficient, 181-221 pmol/L borderline, and ≥222 pmol/L sufficient...
July 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28231061/role-of-treatment-modifying-mthfr677c-t-and-1298a-c-polymorphisms-in-metformin-treated-puerto-rican-patients-with-type-2-diabetes-mellitus-and-peripheral-neuropathy
#12
Francisco J Jiménez-Ramírez, Liza M Castro, Clarymar Ortiz, Jennifer Concepción, Jessicca Y Renta, Raúl H Morales-Borges, Jorge R Miranda-Massari, Jorge Duconge
BACKGROUND: The study was conducted to investigate potential association between MTHFR genotypes and diabetic peripheral neuropathy (DPN) in Puerto Ricans with type-2 diabetes mellitus (T2DM) treated with metformin. The prevalence of major MTHFR polymorphisms in this cohort was also ascertained. METHODS: DNAs from 89 metformin-treated patients with T2DM and DPN were genotyped using the PCR-based RFLP assay for MTHFR677C>T and 1298A>C polymorphisms. Frequency distributions of these variants in the study cohort were compared to those reported for three reference populations (HapMap project) and controls (400 newborn specimens)...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28182265/long-term-metformin-therapy-and-monitoring-for-vitamin-b12-deficiency-among-older-veterans
#13
Vijaya Kancherla, John L Elliott, Birju B Patel, N Wilson Holland, Theodore M Johnson, Anjali Khakharia, Lawrence S Phillips, Godfrey P Oakley, Camille P Vaughan
OBJECTIVE: To examine the association between long-term metformin therapy and serum vitamin B12 monitoring. DESIGN: Retrospective cohort study. SETTING: A single Veterans Affairs Medical Center (VAMC), 2002-2012. PARTICIPANTS: Veterans 50 years or older with either type 2 diabetes and long-term metformin therapy (n = 3,687) or without diabetes and no prescription for metformin (n = 13,258). MEASUREMENTS: We determined diabetes status from outpatient visits, and defined long-term metformin therapy as a prescription ≥500 mg/d for at least six consecutive months...
May 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28076635/prevalence-of-vitamin-b12-deficiency-in-type-2-diabetic-patients-using-metformin-a-cross-sectional-study
#14
Charbel Pereira Damião, Amannda Oliveira Rodrigues, Maria Fernanda Miguens Castellar Pinheiro, Rubens Antunes da Cruz, Gilberto Peres Cardoso, Giselle Fernandes Taboada, Giovanna Aparecida Balarini Lima
CONTEXT AND OBJECTIVE: The prevalence of vitamin B12 deficiency varies from 5.8% to 30% among patients undergoing long-term treatment with metformin. Because of the paucity of data on Brazilian patients, this study aimed to determine the frequency of B12 deficiency and related factors among Brazilian patients with type 2 diabetes mellitus (T2DM) using metformin. DESIGN AND SETTING: Cross-sectional study at a public university hospital. METHODS: Patients with T2DM and a control group of non-diabetics were included...
November 2016: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/27867908/erratum-study-of-vitamin-b12-deficiency-and-peripheral-neuropathy-in-metformin-treated-early-type-2-diabetes-mellitus
#15
(no author information available yet)
[This corrects the article on p. 631 in vol. 20, PMID: 27730072.].
November 2016: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27806244/metformin-and-vitamin-b12-deficiency-where-do-we-stand
#16
REVIEW
Marwan Awad Ahmed
The association between metformin use and low vitamin B12 levels in type 2 diabetes mellitus patients is well-established. However, many aspects of the topic remain to be elucidated. There is still controversy on the current diagnostic approaches to vitamin B12 deficiency. It is now believed that measuring the serum levels of the vitamin may not reflect its metabolic status. Moreover, there were conflicting results from studies attempting to quantify and explore metformin-associated vitamin B12 deficiency and its clinical impacts...
July 2016: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27730072/study-of-vitamin-b12-deficiency-and-peripheral-neuropathy-in-metformin-treated-early-type-2-diabetes-mellitus
#17
Rudra Prasad Roy, Kaushik Ghosh, Manas Ghosh, Amitava Acharyya, Ambarish Bhattacharya, Mrinal Pal, Sisir Chakraborty, Nilanjan Sengupta
BACKGROUND: Long-term therapy with metformin was shown to decrease the Vitamin B12 level and manifested as peripheral neuropathy. AIM: The aim of this study is to define the prevalence of Vitamin B12 deficiency in early Type 2 diabetic patients (duration ≤5 years or drug treatment ≤3 years) and the relationship among metformin exposure and levels of cobalamin (Cbl), folic acid, and homocysteine (Hcy) with severity of peripheral neuropathy. METHODOLOGY: This is a cross-sectional study involving randomly selected ninety patients (male 56, female 34) between age groups of 35 and 70 years, comparing those who had received >6 months of metformin (Group A) (n = 35) with those without metformin (Group B) (n = 35) and patients taking metformin with other oral hypoglycemic agent (Group C) (n = 20)...
September 2016: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27728101/a-observational-study-in-patients-of-diabetes-using-metformin-causing-vitamin-b12-deficiency-causing-peripheral-neuropathy
#18
Shyamal Das, A Chakraborty
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27716423/vitamin-b12-deficiency-in-metformin-treated-type-2-diabetes-patients-prevalence-and-association-with-peripheral-neuropathy
#19
Marwan A Ahmed, George Muntingh, Paul Rheeder
BACKGROUND: The association between long-term metformin use and low vitamin B12 levels has been proven. However, the prevalence estimates of metformin-induced vitamin B12 deficiency showed considerable variation among the studies. The potential of the deficiency to cause or worsen peripheral neuropathy in type-2 diabetes mellitus (T2DM) patients has been investigated with conflicting results. The aim of the study was to investigate: 1) the prevalence of vitamin B12 deficiency in T2DM patients on metformin; 2) the association between vitamin B12 and peripheral neuropathy; 3) and the risk factors for vitamin B12 deficiency in these patients...
October 7, 2016: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27638143/vitamin-b12-deficiency-is-associated-with-cardiovascular-autonomic-neuropathy-in-patients-with-type-2-diabetes
#20
Christian S Hansen, Jan S Jensen, Martin Ridderstråle, Dorte Vistisen, Marit E Jørgensen, Jesper Fleischer
AIMS: Vitamin B12 deficiency could be associated with cardiovascular autonomic neuropathy (CAN) in diabetes patients. We aim to investigate the association between serum levels of vitamin B12 and CAN in type 2 diabetes patients. METHODS: 469 ambulatory type 2 diabetes patients (mean diabetes duration 10.0years (IQR 5.0;17.0), mean age 59.0years (SD 11.6), 63% men, mean B12 289.0pmol/l (IQR 217;390)) were screened for CAN using three cardiovascular reflex tests, five minute resting heart rate (5min RHR) and heart rate variability indices...
January 2017: Journal of Diabetes and its Complications
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