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Compare Metformin vs. Wegovy

Head-to-head comparisons of medication uses, side effects, warnings, and more.

Key takeaways

Metformin (Glumetza, Riomet) and semaglutide (Wegovy) are both medications that can manage metabolic conditions like diabetes or obesity. Metformin is a biguanide that treats Type 2 diabetes, helping control blood sugar by reducing the amount of sugar your body makes and improving insulin use in the body. It is taken orally, usually once or twice a day, and is available in both short-acting and long-acting forms. Common side effects include stomach issues like diarrhea and nausea. Semaglutide, on the other hand, is a glucagon-like peptide-1 (GLP-1) receptor agonist that is injected under the skin once a week. As Wegovy, it is primarily used for long-term weight management and to lower the risk of heart problems in certain adults. Other forms of semaglutide like Ozempic and Rybelsus are used for treating Type 2 diabetes. Common side effects include nausea, diarrhea, and stomach pain. Unlike metformin, semaglutide injection requires refrigeration and has a potential risk for thyroid cancer. Both medications can interact with other diabetes medications, potentially causing low blood sugar.

  • Metformin
    Wegovy (semaglutide)
  • Metformin
    Wegovy (semaglutide)

  • Summary of Metformin vs. Wegovy

    Summary for Biguanide
    Prescription only

    Immediate-release metformin is an oral diabetes medication. It's approved for people 10 years of age and older with Type 2 diabetes. The medication belongs to the drug class called biguanides. It works best to lower blood sugar levels with a diabetes-friendly diet and exercise plan. Immediate-release metformin comes as a tablet and an oral solution. You take this medication by mouth usually two to three times a day. It's recommended to take each dosage with food to help lessen side effects like diarrhea and nausea.

    Summary for GLP-1 agonist
    Prescription only

    Wegovy (semaglutide) is a glucagon-like peptide-1 (GLP-1) receptor agonist. It comes in prefilled pens you use to inject the medication under the skin once a week. Wegovy (semaglutide) also comes as tablets that are swallowed once a day. This medication is approved for weight loss in some people. It can help lower the risk of heart attack, stroke, and death due to heart problems in adults with a larger body size and heart disease. The pens are also approved for certain adults with a liver problem called metabolic dysfunction-associated steatohepatitis (MASH). The medication works best when taken with a lower-calorie diet and regular exercise. Side effects include nausea, diarrhea, and stomach pain.

  • Indications of Metformin vs. Wegovy

    Indications for
    •Type 2 diabetes in people ages 10 years and older
    Indications for

    Injectable pens:

    •

    Weight loss and long-term weight management in:

    •People ages 12 years and older who are considered obese
    •Adults considered overweight with at least one weight-related condition (e.g., high blood pressure, Type 2 diabetes, high cholesterol)
    •

    Lowering the risk of heart attack, stroke, and death due to heart problems in adults with a larger body size and heart disease

    •

    Metabolic dysfunction-associated steatohepatitis (MASH) in adults with moderate-to-advanced liver scarring, but not cirrhosis

    Tablets:

    •Weight loss and long-term weight management in adults who are considered obese or overweight with at least one weight-related condition
    •Lowering the risk of heart attack, stroke, and death due to heart problems in adults with a larger body size and heart disease

  • Pros and Cons of Metformin vs. Wegovy

    Pros and Const for Biguanide
    Pros
    •One of the first-choice options for Type 2 diabetes
    •Works well at lowering blood sugar levels (can lower your A1C by up to 1.5% in a few months)
    •Unlikely to cause weight gain
    •Available as a liquid for people who have trouble swallowing tablets
    Cons
    •Typically need to take a couple times per day
    •Can cause stomach upset, including diarrhea, nausea, gas, and stomach cramping
    •Not a good choice for people with severe kidney problems
    •Not recommended for people with liver problems
    Pros and Const for GLP-1 agonist
    Pros
    •Available as once-weekly injectable pens and as once-daily pills
    •Injectable pens approved for weight loss in children ages 12 years and older considered obese
    Cons
    •Can cause stomach pain, nausea, and diarrhea
    •Can't take with other semaglutide products (Ozempic, Rybelsus) or with other GLP-1 agonists

  • Common Side Effects of Metformin vs. Wegovy

    Common Side Effects for
    •Diarrhea (53%)
    •Nausea or vomiting (26%)
    •Gas (12%)
    •Weakness (9%)
    Common Side Effects for
    •Nausea (44%)
    •Diarrhea (30%)
    •Vomiting (24%)
    •Constipation (24%)
    •Stomach pain (20%)
    •Headache (14%)
    •Tiredness (11%)

  • Warnings of Metformin vs. Wegovy

    Common Side Effects for
    •Lactic acidosis
    •Low vitamin B12 levels
    •Low blood sugar (hypoglycemia) when taken with certain other diabetes medications
    Common Side Effects for
    •Possible risk for thyroid cancer
    •Inflammation of the pancreas (pancreatitis)
    •Gallbladder problems
    •Low blood sugar
    •Kidney damage
    •Allergic reactions
    •Eye problems in people with Type 2 diabetes (diabetic retinopathy)
    •Faster heart rate
    •Possible risk of self-harm
    •Lung problems during general anesthesia or deep sedation

  • Prices with our coupons for Metformin vs. Wegovy

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    Learn more about Wegovy

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