Lactic acidosis is a rare but serious side effect of this drug. With this condition, lactic acid builds up in your blood. This is a medical emergency that requires treatment in the hospital. Lactic acidosis is fatal in about half of people who develop it. You should stop taking this drug and call your doctor right away or go to the emergency room if you have symptoms of lactic acidosis.

Persistent hypertension is one of the risk factors for strokes, heart attacks, heart failure and arterial aneurysms, and is the leading cause of chronic kidney failure. Even moderate elevation of arterial pressure leads to shortened life expectancy. At severely high pressures, mean arterial pressures 50% or more above average, a person can expect to live no more than a few years unless appropriately treated.[40]
Pre-eclampsia is a serious condition of the second half of pregnancy and following delivery characterised by increased blood pressure and the presence of protein in the urine.[23] It occurs in about 5% of pregnancies and is responsible for approximately 16% of all maternal deaths globally.[23] Pre-eclampsia also doubles the risk of death of the baby around the time of birth.[23] Usually there are no symptoms in pre-eclampsia and it is detected by routine screening. When symptoms of pre-eclampsia occur the most common are headache, visual disturbance (often "flashing lights"), vomiting, pain over the stomach, and swelling. Pre-eclampsia can occasionally progress to a life-threatening condition called eclampsia, which is a hypertensive emergency and has several serious complications including vision loss, brain swelling, seizures, kidney failure, pulmonary edema, and disseminated intravascular coagulation (a blood clotting disorder).[23][31]
What if you don’t have type 2 diabetes? Can you still take metformin for weight loss? This is an excellent question, and the short answer is yes. Sood explains that metformin has been used off-label (or outside its intended purpose) for weight management. But since this drug is only available by prescription and hasn’t been approved for weight loss by the Federal Drug Administration (FDA), your doctor might first recommend traditional strategies for weight loss.
Is it safe to use metformin during pregnancy? Metformin is commonly prescribed for managing type 2 diabetes. Although it effectively lowers blood sugar, is it safe for women to take during pregnancy? This MNT Knowledge Center article examines the evidence of its effects on ferility before pregnancy as well as its possible side effects during pregnancy, Read now

The new guidelines stem from the 2017 results of the Systolic Blood Pressure Intervention Trial (SPRINT), which studied more than 9,000 adults ages 50 and older who had systolic blood pressure (the top number in a reading) of 130 mm Hg or higher and at least one risk factor for cardiovascular disease. The study's aim was to find out whether treating blood pressure to lower the systolic number to 120 mm Hg or less was superior to the standard target of 140 mm Hg or less. The results found that targeting a systolic pressure of no more than 120 mm Hg reduced the chance of heart attacks, heart failure, or stroke over a three-year period.

Before having surgery or any X-ray/scanning procedure using iodinated contrast, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). You may need to stop this medication for a short time for the surgery/procedure. Ask your doctor or dentist for instructions before your surgery/procedure.
^ Knowler WC, Barrett-Connor E, Fowler SE, Hamman RF, Lachin JM, Walker EA, Nathan DM, et al. (Diabetes Prevention Program Research Group) (February 2002). "Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin". The New England Journal of Medicine. 346 (6): 393–403. doi:10.1056/NEJMoa012512. PMC 1370926. PMID 11832527.
In type 2 diabetes the cells in the body, particularly muscle, fat and liver cells, become resistant to the action of insulin. Insulin is the main hormone responsible for controlling the level of sugar (glucose) in the blood. It makes cells in the body remove sugar from the blood. When the cells are resistant to insulin this makes blood sugar levels rise too high.
Not enough info for you? Geek out on blood pressure and hypertension with these studies and stats from the most trusted sources on the interwebs. And if you have any questions or you think we missed something important, leave a comment or book a consultation with me or one of these trained medical professionals and we’ll answer your questions and concerns in no time.
The pulse pressure is a consequence of the pulsatile nature of the cardiac output, i.e. the heartbeat. The magnitude of the pulse pressure is usually attributed to the interaction of the stroke volume of the heart, the compliance (ability to expand) of the arterial system—largely attributable to the aorta and large elastic arteries—and the resistance to flow in the arterial tree.[66]
Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up-to-date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.
These guidelines help guide healthcare practices, and can be related to patient reimbursement and healthcare coverage. The tenth revision of the International Statistical Classification of Diseases and Related Health Problems, or ICD-10, is the set of codes used to designate specific health conditions and allow for reimbursement through health insurance programs.
Metformin has been suggested as increasing production of lactate in the large intestine, which could potentially contribute to lactic acidosis in those with risk factors.[76] However, the clinical significance of this is unknown, and the risk of metformin-associated lactic acidosis is most commonly attributed to decreased hepatic uptake rather than increased intestinal production.[31][75][77]
How do you check your own blood pressure? It is common to have your blood pressure checked at the doctor's office, but there are many cases where it is important to monitor it at home. It is easy to check blood pressure with an automated machine, but it can also be done manually at home. Learn how to check your own blood pressure and what the results mean. Read now
^ Jump up to: a b Burt VL, Cutler JA, Higgins M, et al. (July 1995). "Trends in the prevalence, awareness, treatment, and control of hypertension in the adult US population. Data from the health examination surveys, 1960 to 1991". Hypertension. 26 (1): 60–69. doi:10.1161/01.HYP.26.1.60. PMID 7607734. Archived from the original on 2012-12-20. Retrieved 5 June 2009.

Hypertension results from a complex interaction of genes and environmental factors. Numerous common genetic variants with small effects on blood pressure have been identified[34] as well as some rare genetic variants with large effects on blood pressure.[35] Also, genome-wide association studies (GWAS) have identified 35 genetic loci related to blood pressure; 12 of these genetic loci influencing blood pressure were newly found.[36] Sentinel SNP for each new genetic locus identified has shown an association with DNA methylation at multiple nearby CpG sites. These sentinel SNP are located within genes related to vascular smooth muscle and renal function. DNA methylation might affect in some way linking common genetic variation to multiple phenotypes even though mechanisms underlying these associations are not understood. Single variant test performed in this study for the 35 sentinel SNP (known and new) showed that genetic variants singly or in aggregate contribute to risk of clinical phenotypes related to high blood pressure.[36]

Hypertension is a serious chronic disorder that can cause many harmful health effects over time. If you are an adult over the age of 20, you should have your blood pressure checked by your healthcare provide at your regular health visit. If you are over the age of 40, it's important to have your blood pressure checked annually. Remember, the reading you get from a manual machine or at the pharmacy may not be accurate.
An elevated blood pressure reading means that your blood pressure falls just above the normal level, corresponding to a systolic pressure between 120 and 129 or a diastolic pressure of 80 or less. The new guidelines eliminate the previous category of prehypertension. About one-fourth of Americans have elevated levels and they have two times the risk of heart disease compared with those who have lower blood pressures. Lifestyle changes can help many people with prehypertension lower their blood pressure.
Barreto notes that the ease of access to junk food and living off a fast-food diet leads to the higher obesity, which can result in high blood pressure. People are at greater risk for sleep apnea, kidney problems, heart disease, thyroid disease and developing tumors when they suffer from high blood pressure. He points out there are several ways to see improvement with high blood pressure numbers. One is to simply get moving.  “Our society needs more emphasis on being active and consuming a healthy diet,” Dr. Barreto said.

2. Take the right nutrients. Talk with your chiropractor or other healthcare professional about the wide range of well-studied nutrients that, along with dietary and lifestyle modifications, can help normalize your blood pressure. One meta-analysis found magnesium supplements could lower blood pressure. Likewise, researchers find a small but significant decline in blood pressure for people with hypertension who use fish oil. (You can get all of fish oil’s benefits combined with anti-inflammatory flax oil and GLA in our Optimal Omega.) 


If these lifestyle changes don't lower your blood pressure to a safe level, your doctor will also prescribe medicine. You may try several kinds or combinations of medicines before finding a plan that works best for you. Medicine can control your blood pressure, but it can't cure it. You will likely need to take medicine for the rest of your life. Plan with your doctor how to manage your blood pressure.
Related to weight loss is developing a healthy diet, another essential tool for lowering blood pressure. Healthy nutrition is important for all of the standard reasons (positive cardiovascular health, additional energy, etc.) and a few unique reasons as well. A low salt diet is particularly important for lowering blood pressure, as salt indirectly increases the volume of blood (by adding water to the bloodstream), which in turn increases blood pressure.

Hypertension clinical guidelines from the American Heart Association are comprehensive guidelines for healthcare professionals for the detection and treatment of high blood pressure in a wide range of patients. Included in the 2018 hypertension clinical guidelines are proper methods for measuring blood pressure, risk factors for hypertension, and hypertension treatment for different populations. 

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
If your blood pressure remains high for a long period of time, you run the risk of damaging your blood vessels. Your stroke risk rises significantly, too. And because your heart is working harder to push blood through your system, that very valuable muscle can become overworked and grow thicker. An enlarged heart causes further complications, including heart failure. Medications and special implantable pumps can help boost heart function. But if you can manage your blood pressure before it gets too high and puts your heart at risk, you may be able to avoid a lot of complications down the road.
Pre-eclampsia is a serious condition of the second half of pregnancy and following delivery characterised by increased blood pressure and the presence of protein in the urine.[23] It occurs in about 5% of pregnancies and is responsible for approximately 16% of all maternal deaths globally.[23] Pre-eclampsia also doubles the risk of death of the baby around the time of birth.[23] Usually there are no symptoms in pre-eclampsia and it is detected by routine screening. When symptoms of pre-eclampsia occur the most common are headache, visual disturbance (often "flashing lights"), vomiting, pain over the stomach, and swelling. Pre-eclampsia can occasionally progress to a life-threatening condition called eclampsia, which is a hypertensive emergency and has several serious complications including vision loss, brain swelling, seizures, kidney failure, pulmonary edema, and disseminated intravascular coagulation (a blood clotting disorder).[23][31]
^ Musi N, Hirshman MF, Nygren J, Svanfeldt M, Bavenholm P, Rooyackers O, Zhou G, Williamson JM, Ljunqvist O, Efendic S, Moller DE, Thorell A, Goodyear LJ (July 2002). "Metformin increases AMP-activated protein kinase activity in skeletal muscle of subjects with type 2 diabetes". Diabetes. 51 (7): 2074–81. doi:10.2337/diabetes.51.7.2074. PMID 12086935.
If you drink alcohol often or in great quantity: Again, because metformin relies on the function of a healthy liver and kidneys, a person who drinks large amounts of alcohol on a regular basis would be putting themselves at an increased risk for other issues if they took metformin. If you are concerned about your personal alcohol consumption, take a look at these helpful resources listed at Alcohol.org.

^ Qaseem, A; Wilt, TJ; Rich, R; Humphrey, LL; Frost, J; Forciea, MA; Clinical Guidelines Committee of the American College of Physicians and the Commission on Health of the Public and Science of the American Academy of Family, Physicians. (21 March 2017). "Pharmacologic Treatment of Hypertension in Adults Aged 60 Years or Older to Higher Versus Lower Blood Pressure Targets: A Clinical Practice Guideline From the American College of Physicians and the American Academy of Family Physicians". Annals of Internal Medicine. 166 (6): 430–437. doi:10.7326/m16-1785. PMID 28135725. 

Another way metformin is helpful to diabetic and pre-diabetic patients is that is has been shown to slow down and reduce the absorption of carbohydrates through intestines, which further helps control blood sugar levels. It also increases the ability of muscles to absorb glucose so that the body can use it more productively. Metformin is particularly useful at keeping night-time glucose levels in check, although it helps maintain the levels all throughout the day as well.
AMPK probably also plays a role in increased peripheral insulin sensitivity, as metformin administration increases AMPK activity in skeletal muscle.[105] AMPK is known to cause GLUT4 deployment to the plasma membrane, resulting in insulin-independent glucose uptake. Some metabolic actions of metformin do appear to occur by AMPK-independent mechanisms; the metabolic actions of metformin in the heart muscle can occur independent of changes in AMPK activity and may be mediated by p38 MAPK- and PKC-dependent mechanisms.[106]
^ Knowler WC, Fowler SE, Hamman RF, Christophi CA, Hoffman HJ, Brenneman AT, Brown-Friday JO, Goldberg R, Venditti E, Nathan DM, et al. (Diabetes Prevention Program Research Group) (November 2009). "10-year follow-up of diabetes incidence and weight loss in the Diabetes Prevention Program Outcomes Study". Lancet. 374 (9702): 1677–86. doi:10.1016/S0140-6736(09)61457-4. PMC 3135022. PMID 19878986.

Stress leads to temporary elevations of blood pressure, but there is no proof that stress causes ongoing high blood pressure. Stress may have an indirect effect on blood pressure since it can influence other risk factors for heart disease. People who are under stress tend to engage more in unhealthy habits like poor nutrition, alcohol use, and smoking, all of which can play a role in the development of high blood pressure and heart disease.


If at any point in your journey the side effects of metformin become too much to live with, do consult your doctor to get professional medical help and advice. They might review your dosage and potentially decrease it to curb some of the symptoms. Your doctor may also prescribe you a different formulation of the drug, maybe a slower-releasing for of it, to help stabilise your symptoms.
Metformin is not metabolized. It is cleared from the body by tubular secretion and excreted unchanged in the urine; metformin is undetectable in blood plasma within 24 hours of a single oral dose.[89][116] The average elimination half-life in plasma is 6.2 hours.[89] Metformin is distributed to (and appears to accumulate in) red blood cells, with a much longer elimination half-life: 17.6 hours[89] (reported as ranging from 18.5 to 31.5 hours in a single-dose study of nondiabetics).[116]

Why stress happens and how to manage it Stress is essential for survival; the chemicals it triggers help the body prepare to face danger and cope with difficulty. Long-term stress is linked to various health conditions and can cause physical and psychological symptoms. How is it diagnosed, what types of stress are there, and how is it treated or managed? Read now
Metformin was discovered in 1922.[13] French physician Jean Sterne began study in humans in the 1950s.[13] It was introduced as a medication in France in 1957 and the United States in 1995.[5][14] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[15] Metformin is believed to be the most widely used medication for diabetes which is taken by mouth.[13] It is available as a generic medication.[5] The wholesale price in the developed world was between US$0.21 and US$5.55 per month as of 2014.[16] In the United States, it costs US$5 to US$25 per month.[5] In 2016 it was the 4th most prescribed medication in the United States with more than 81 million prescriptions.[17]
Angiotensin receptor blockers prevent the actions of angiotensin II on the arteries. This means the arteries stay more open and blood pressure is lowered. ARBs can take a few weeks to work. Side effects can include dizziness, muscle cramps, insomnia, and elevated potassium levels. As with ACE inhibitors, women who are pregnant, planning to get pregnant, or breastfeeding should not take ARBs.

^ Qaseem A, Wilt TJ, Rich R, Humphrey LL, Frost J, Forciea MA (17 January 2017). "Pharmacologic Treatment of Hypertension in Adults Aged 60 Years or Older to Higher Versus Lower Blood Pressure Targets: A Clinical Practice Guideline From the American College of Physicians and the American Academy of Family Physicians". Annals of Internal Medicine. 166 (6): 430–437. doi:10.7326/M16-1785. PMID 28135725.
Metformin can also cause impaired kidney and liver functions. This can happen if a patient takes an overly large dose of the drug, which can make it hard for the liver to process it. Kidneys will also be affected. In extreme cases, it is possible for the kidney and liver to fail completely, leading to a lot of complications in the patient. Be very careful about dosage when it comes to metformin.
It was withdrawn from the market in the UK and India in 2010,[140] and in New Zealand and South Africa in 2011.[141] From November 2011 until November 2013 the FDA[142] did not allow rosiglitazone or metformin/rosiglitazone to be sold without a prescription; moreover, makers were required to notify patients of the risks associated with its use, and the drug had to be purchased by mail order through specified pharmacies.[143]
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