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New research links weight loss medications like Ozempic and Wegovy to a greater risk of pancreatitis, gastroparesis, and bowel obstruction.

Glucagon-like peptide 1 (GLP-1) agonists, more commonly known by such brand names as Ozempic and Wegovy, are medications that have gained widespread attention, known for their ability to help people lose weight.

However, research has demonstrated side effects among patients taking the medication, including biliary disease (diseases of the gallbladder and bile ducts), pancreatitis (inflammation of the pancreas), bowel obstruction, and gastroparesis (delayed emptying of the stomach contents into the small intestine).

These medications work by activating receptors in the pancreas to enhance insulin release and decrease the release of another hormone, glucagon. They also decrease appetite though their action of slowing gastric emptying, which affects your central nervous system.

While this is the reason the drugs result in successful weight loss, the function may also contribute to negative side effects. Severe side effects can include potential long-term problems on the thyroid gland and pancreas.

In a new study, published earlier this month in JAMA, researchers decided to explore these adverse side effects associated with GLP-1 agonists. The study’s results indicated that the use of GLP-1 agonists for weight loss was linked to a greater risk of pancreatitis, gastroparesis, and bowel obstruction. The rapid weight loss associated with these medications causes an increased flux of cholesterol through the gallbladder, which can promote the growth of gallstones. These stones can trigger pancreatitis.

The FDA, along with researchers and patients, have noted various side effects, ranging from mild to severe, associated with using these injectable drugs, including:

  • Nausea, abdominal pain, constipation, heartburn, diarrhea or vomiting

  • Rash, itching, swelling

  • Difficulty breathing or swallowing

  • Vision changes, fainting or dizziness

  • Rapid heartbeat

  • Pain at the injection site

  • Loss of buccal fat, also known as “Ozempic face”

  • Your blood sugar may drop too low if you take this drug with other blood sugar-lowering medications

  • You may regain some or all of the weight when you stop taking the drug

muscle loss

There is real concern about the connection to lost muscle mass. A 2021 clinical trial on semaglutide found that about 40% of the weight people lost came from lean mass, including muscle tissue.

“But I do think it is incredibly important to warn patients of this possibility and emphasize the important of exercise, particularly strength training and not just cardio, to preserve their muscle strength and mass."

- Shauna Levy, MD, medical director of Tulane Hospital’s Bariatric and Weight Loss Center.

Muscle changes can be dangerous for older adults

Muscle loss can be particularly problematic for people over 50 since it becomes harder and harder to regain muscle as you age.

“There’s a generalized decline in muscle strength and mass as people age, and it really tends to accelerate later in life. Patients with metabolic disorders like diabetes and obesity have higher rates of sarcopenia."

- Jeremy Walston, MD, co-director of the Biology of Healthy Aging program at Johns Hopkins.

It’s important to note that if you start taking either of these drugs for weight loss, your body may get used to it, establishing a new normal. Research has shown that if you stop taking Ozempic (or Wegovy), it's likely that you will gain back the weight you lost. People who stop taking these drugs often gain weight back relatively quickly.

If you lose weight with new drugs, you likely will need to keep taking the medications forever to keep the weight off.

"Normal-weight patients without diabetes might lose weight if they take these drugs, but the risks of the medication outweigh the benefit of weight loss just to be thin. These drugs have not been studied in this population and we will likely see more side effects with this type of inappropriate use.”

- Rekha Kumar, MD, the chief medical officer at the medically assisted weight loss program Found, and an endocrinologist in New York City

Why exercise should be your drug of choice

While getting an injection may seem easier than sweating it out at the gym, remember that exercise confers a plethora of health benefits without any of these side effects.

Without insurance, Ozempic costs around $892 per month, on average.

My hope is that people reading this article will consider exercise (and healthy eating) before spending a ridiculous amount of money on something that could harm you.

You will likely need to take this medication forever to avoid "Ozempic rebound" because most people re-gain the weight once they stop the medication.

The issue at hand is the fact that many people do not want to make the effort to lose weight the natural way. They would rather risk potential long term side effects for a quick fix.

Why risk it?

1 comment

1 Comment

My husband started taking Wegovy injections last month and after the second injection he started feeling a lot of the negative side effects...BAD. Spent the Friday evening before Christmas in the local ER when he felt cold, very dizzy, had blurred vision, was very constipated and complained of tightness in his throat. Also had very bad digestive issues - acid reflux and crazy burping - to the point where it kept him awake at night. Heart problems ruled out in ER and determined it was mostly gastritis brought on by the Wegovy - it slows your digestion down while your stomach still pumps out acid trying so hard to digest the food sitting there. ER doctors gave him meds for…

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