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In our  blog series “vs,”  we provide information about the key differences between the most common weight-loss injections and pills. This blog post contains a detailed description of the differences between Ozempic and Mounjaro . 

Mounjaro vs. Ozempic – What are the differences?

Both medications affect hunger and blood sugar regulation – but differ in active ingredient, approval, and effectiveness.

  • Ozempic contains semaglutide , a GLP-1 (glucagon-like peptide-1) receptor agonist, which is injected weekly and is approved for the treatment of type 2 diabetes.
  • Mounjaro contains tirzepatide , a novel dual-receptor agonist that activates both the gut hormone GLP-1 and GIP (glucose-dependent insulinotropic peptide) – also administered once weekly. Mounjaro is approved for the treatment of type 2 diabetes and additionally for weight loss, i.e., for the treatment of individuals with obesity (BMI ≥ 30) or overweight (BMI ≥ 27) and at least one weight-related comorbidity. Studies have shown that Mounjaro is more effective than Ozempic for blood glucose control and weight loss.

How do Mounjaro and Ozempic work?

Ozempic (Semaglutide) :

  • GLP-1 receptor agonist.
  • Promotes insulin secretion while simultaneously protecting against excessively low blood sugar levels.
  • It slows down gastric emptying and reduces appetite.

Mounjaro (Tirzepatid):

  • Dual receptor agonist : activates both GLP-1 and GIP receptors.
  • Leads to reduced appetite, improved insulin sensitivity, and delayed gastric emptying. (“Improves glucose metabolism”)
  • It has an additional effect through GIP: enhanced metabolic effect on lipolysis .

Who is Mounjaro suitable for – and who is Ozempic suitable for?

Mounjaro and Ozempic are both prescription medications that you can inject subcutaneously (under the skin) once a week. They effectively control blood sugar levels in people with type 2 diabetes. Whether Mounjaro or Ozempic is more suitable depends on your medical history, needs, and treatment goals.

If the primary goal is weight loss, it is important to consider that Ozempic can only be prescribed for this purpose in so-called off-label use, whereas Mounjaro is explicitly approved for the treatment of obesity or overweight. It belongs to the new generation of weight-loss injections because it has a dual effect – on both GLP-1 and GIP receptors. Studies ( Jastreboff, AM, et al. 2022 ) suggest that it may offer additional benefits by simultaneously influencing several endogenous, nutrient-stimulated hormonal pathways.

Both medications should generally only be used under medical supervision – and ideally in combination with a holistic concept that includes nutrition, exercise and behavior.

Switching between medications

Important to consider:

Switching between Mounjaro and Ozempic is generally possible, but should only be done under medical supervision . There are differences in dosage, tolerability, and effectiveness. A seamless transition is not always guaranteed, and individual reactions to the active ingredients must be taken into account.

Advantages and disadvantages of switching

A switch from Ozempic to Mounjaro (or vice versa) can be beneficial in the following cases:

  • Side effects of the previous medication.
  • A different mechanism of action may appear more promising in the individual case.
  • Individual reactions to the respective active ingredient.

Expected weight loss: Mounjaro vs. Ozempic

Studies show an average weight loss of:

  • With Mounjaro,  weight loss can be up to 22.5% , depending on the dosage and duration of therapy.
  • Ozempic also leads to weight loss, which is usually between 5 and 10% , depending on the dose and individual response.

Summary: Mounjaro vs. Ozempic

  • Ozempic: primarily for type 2 diabetics to control blood sugar, available in dosages up to a maximum of 1 mg/week. Ozempic is not a weight-loss medication, but is mainly used to treat diabetes!
  • Mounjaro: in addition to the treatment of type 2 diabetes, it is also available specifically for medical weight loss in cases of obesity and overweight up to a maximum of 15 mg/week.
  • Both medications require a prescription and should only be used under medical supervision.

Note:  This article is for informational purposes only and does not replace medical advice.

Sources:

EMA product information on Mounjaro and Ozempic

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