Although metformin is often the go-to drug for diabetics and pre-diabetics, there are things you need to pay attention to when starting medicating with metformin. There are a few metformin side effects that some patients have experienced. Although generally very well-tolerated, different patients’ response to metformin may vary from one individual to another due to differences in body factors.
Metformin is capable of affecting the level of certain hormones in the body, especially in large doses. For instance, an overdose may lead to a reduction in the blood levels of thyroid-stimulating hormones, especially if the individual has a history of suffering from hypothyroidism. It can also cause a reduction of the blood level in testosterone and luteinizing hormones found in men.

The findings mean that an additional 14 percent of U.S. adults, or about 30 million people, will now be diagnosed as having high blood pressure, compared with the number diagnosed before the new guidelines. This will bring the total percentage of U.S. adults with high blood pressure to 46 percent, up from 32 percent previously. [9 New Ways to Keep Your Heart Healthy]
^ Jump up to: a b Acierno, Mark J.; Brown, Scott; Coleman, Amanda E.; Jepson, Rosanne E.; Papich, Mark; Stepien, Rebecca L.; Syme, Harriet M. (2018-10-24). "ACVIM consensus statement: Guidelines for the identification, evaluation, and management of systemic hypertension in dogs and cats". Journal of Veterinary Internal Medicine. 32 (6): 1803–1822. doi:10.1111/jvim.15331. ISSN 1939-1676. PMC 6271319. PMID 30353952.
But it’s not all bad news. Yes, hypertension contributes to a lot of serious conditions, but blood pressure treatment options are very effective. And the first step, of course, is knowing if you have high blood pressure. You can check your blood pressure for free at many pharmacies nationwide. CVS “Minute Clinics” and Walgreens Blood Pressure screening both offer in-store blood pressure test.
Regardless of the side effects of Metformin, it’s still a widely used, effective and a leading anti-diabetic drug. If you are concerned about these side effects or they became more severe over time make sure to discuss it with your doctor. Also, remember not to lower or increase your Metformin dosage as a result without consulting your doctor first.
Everybody’s blood pressure goes up and down throughout the day. Walking to work, meditating, stressing about your Facebook feed, taking that sweet afternoon nap, and pounding a triple shot espresso all influence your blood pressure. There’s even a thing called “White Coat Hypertension” where people report higher than normal blood pressure readings due to the stress of just being in a doctor’s office with a cuff strapped to your arm. Blood pressure is a moving target. It’s not the end of the world if it spikes every now and then.

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]

^ Jump up to: a b Inzucchi SE, Bergenstal RM, Buse JB, Diamant M, Ferrannini E, Nauck M, Peters AL, Tsapas A, Wender R, Matthews DR (June 2012). "Management of hyperglycemia in type 2 diabetes: a patient-centered approach: position statement of the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD)". Diabetes Care. 35 (6): 1364–79. doi:10.2337/dc12-0413. PMC 3357214. PMID 22517736.


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.
^ Roerecke, Michael; Tobe, Sheldon W.; Kaczorowski, Janusz; Bacon, Simon L.; Vafaei, Afshin; Hasan, Omer S. M.; Krishnan, Rohin J.; Raifu, Amidu O.; Rehm, Jürgen (27 June 2018). "Sex‐Specific Associations Between Alcohol Consumption and Incidence of Hypertension: A Systematic Review and Meta‐Analysis of Cohort Studies". Journal of the American Heart Association. 7 (13): e008202. doi:10.1161/JAHA.117.008202.
A systolic pressure range of 120 to 139 and a diastolic pressure range of 80 to 89. Diagnosis with prehypertension provides an opportunity to work hard-through physical activity, diet, and possibly medication-to reduce blood pressure to a healthy level. Within four years of diagnosis with prehypertension, one in three adults ages 35 to 64 will develop definite high blood pressure. One in two adults over age 65 will develop definite high blood pressure.
Metformin is generally well tolerated.[10] Common side effects include diarrhea, nausea and abdominal pain.[5] It has a low risk of causing low blood sugar.[5] High blood lactic acid level is a concern if the medication is prescribed inappropriately and in overly large doses.[11] It should not be used in those with significant liver disease or kidney problems.[5] While no clear harm comes from use during pregnancy, insulin is generally preferred for gestational diabetes.[5][12] Metformin is in the biguanide class.[5] It works by decreasing glucose production by the liver and increasing the insulin sensitivity of body tissues.[5]

3. Implement strategies to lower inflammation. Several cross-sectional and longitudinal studies connect high blood pressure with chronic inflammation, a driving force for nearly every disease on the planet. Lowering inflammation starts with what you put on your fork. Focus on anti-inflammatory foods like wild-caught seafood (rich in omega-3 fatty acids), freshly ground flax and chia seeds, spices like turmeric, and plenty of colorful plant foods. Good sleep, stress management, exercise, and the right nutrients can also help lower inflammation.
^ Expert Panel on Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents, National Heart, Lung, and Blood Institute (Dec 2011). "Expert panel on integrated guidelines for cardiovascular health and risk reduction in children and adolescents: summary report". Pediatrics. 128 Suppl 5: S213–56. doi:10.1542/peds.2009-2107C. PMC 4536582. PMID 22084329.

Baroreceptors in low pressure receptor zones (mainly in the venae cavae and the pulmonary veins, and in the atria) result in feedback by regulating the secretion of antidiuretic hormone (ADH/Vasopressin), renin and aldosterone. The resultant increase in blood volume results in an increased cardiac output by the Frank–Starling law of the heart, in turn increasing arterial blood pressure.
What is a normal blood pressure? Blood pressure is essential to life because it forces the blood around the body, delivering all the nutrients it needs. Here, we explain how to take your blood pressure, what the readings mean, and what counts as low, high, and normal. The article also offers some tips on how to maintain healthy blood pressure. Read now
Elevated blood pressures in the medical setting may not necessarily reflect the individuals real status. "White coat hypertension" describes a patient whose blood pressure is elevated because of the stress of the visit to the doctor or other healthcare professional, and the worry that their blood pressure might be elevated. Repeated blood pressure checks at the doctor's office or the use of a home blood pressure monitoring device may be used to confirm that you have high blood pressure.

Metformin may be quantified in blood, plasma, or serum to monitor therapy, confirm a diagnosis of poisoning, or assist in a forensic death investigation. Blood or plasma metformin concentrations are usually in a range of 1–4 mg/l in persons receiving therapeutic doses, 40–120 mg/l in victims of acute overdosage, and 80–200 mg/l in fatalities. Chromatographic techniques are commonly employed.[86][87]


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:
Recurrent headaches: Headaches are fairly common among people with or without hypertension. Some people with hypertension notice changes or worsening of headaches when medications are skipped or when the blood pressure becomes higher than usual. Headaches associated with hypertension can be mild, moderate, or severe and can be of a throbbing nature. 
Cut down on salt. As you get older, the body and blood pressure become more sensitive to salt (sodium), so you may need to watch how much salt is in your diet. Most of the salt comes from processed foods (for example, soup and baked goods). A low-salt diet, such as the DASH diet, might help lower your blood pressure. Talk with your doctor about eating less salt.
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.
^ Rydén L, Grant PJ, Anker SD, Berne C, Cosentino F, Danchin N, Deaton C, Escaned J, Hammes HP, Huikuri H, Marre M, Marx N, Mellbin L, Ostergren J, Patrono C, Seferovic P, Uva MS, Taskinen MR, Tendera M, Tuomilehto J, Valensi P, Zamorano JL (May 2014). "ESC guidelines on diabetes, pre-diabetes, and cardiovascular diseases developed in collaboration with the EASD - summary". Diabetes & Vascular Disease Research. 11 (3): 133–73. doi:10.1177/1479164114525548. PMID 24800783.
According to the American Diabetes Association Standards of Care, Metformin, if tolerated, is the preferred initial oral diabetes medication for Type 2 diabetes because it is the most effective. Unlike people with Type 1 diabetes, people with Type 2 diabetes make ​insulin. The problem is that they are either not making enough insulin or the insulin they do make isn't being used efficiently. Metformin is a weight neutral medication that helps the body use insulin. Weight neutral means that it is not associated with weight gain (or loss) as are many other diabetes medications.
When you first start taking Metformin, you will likely lose some weight as the medication can cause feelings of fullness and a loss of appetite. If you start taking the medication while following a strict diet and exercise plan, then you may see a significant reduction in weight. This is a more desirous side effect as it is strongly suggested that diabetics lose weight so that their bodies have better control of their glucose levels and an improved insulin resistance.
Some side effects of metformin 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:
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