How does Ozempic work for weight loss?
Few drug names have generated as much media attention in recent years as Ozempic. Its popularity has grown considerably, largely linked to the effect on weight loss seen in some users, which has created confusion about what it is actually indicated for. In this article we explain, from a medical perspective, what Ozempic is, what it is authorised for, and why its use should always be supervised by a specialist.
What Ozempic is
Ozempic is the brand name for semaglutide in the presentation authorised for the treatment of type 2 diabetes mellitus. It belongs to the group of medicines known as GLP-1 receptor agonists, which work by mimicking the effect of an intestinal hormone involved in regulating glucose and appetite.
According to the information published by the European Medicines Agency (EMA), Ozempic is authorised for the treatment of adults with type 2 diabetes, either on its own or in combination with other medicines, when diet and exercise are not enough to achieve adequate control of blood glucose.
How Ozempic works in the body
The semaglutide in Ozempic acts on the GLP-1 receptor, producing several beneficial effects for the control of diabetes:
- It stimulates the release of insulin in a way that depends on blood glucose levels.
- It reduces the liver’s production of glucose by lowering the secretion of glucagon.
- It slows gastric emptying, which contributes to a greater feeling of fullness.
As a result of this last effect, many patients with type 2 diabetes treated with Ozempic also experience a reduction in body weight, although this is not the main purpose for which the medicine is authorised in this particular presentation.
A use that causes confusion: Ozempic and weight loss
In recent years, the use of Ozempic outside its authorised indication has become popular — that is, in people without diabetes who are simply seeking to lose weight. This practice poses significant risks, since the medicine has not been evaluated or authorised for this specific use in its usual formulation and doses, and using it without proper medical supervision can be associated with avoidable adverse effects.
For the specific treatment of obesity, there are other presentations of semaglutide specifically authorised for this purpose, as well as other therapeutic options, whose use should always be assessed on an individual basis by a specialist. Self-medication or the use of Ozempic for purely cosmetic purposes is not a medically advisable practice.
Who it is really indicated for
Ozempic is indicated for adults with a diagnosis of type 2 diabetes mellitus who have not achieved adequate glycaemic control with other measures. The decision to start this treatment should be based on a full medical assessment that takes into account how long the person has had diabetes, their previous treatment, the presence of other conditions and the patient’s overall cardiovascular risk.
According to data from the American Diabetes Association (ADA), the management of type 2 diabetes should always be individualised, combining the most appropriate drug treatment with sustained lifestyle changes.
Side effects and medical follow-up
The most common adverse effects associated with Ozempic are digestive in nature: nausea, diarrhoea, constipation or abdominal discomfort, especially at the start of treatment. There are also certain contraindications, such as a personal or family history of certain thyroid tumours or previous pancreatitis, which must be carefully assessed before starting treatment.
Regular medical follow-up makes it possible to evaluate the response to treatment, adjust the dose when necessary and detect possible side effects early, ensuring safe and effective use of the medicine.
The importance of an individualised approach
Any decision relating to the treatment of type 2 diabetes, including the use of medicines such as Ozempic, should always be taken together with a specialist who can assess the case as a whole. At the Dr Christian Leyva Diabetes Unit, each patient receives personalised follow-up, with treatment tailored to their specific needs and control goals.
Beyond the media popularity of a particular brand name, what really matters for any patient is having an accurate diagnosis, a treatment plan adapted to their clinical situation and continuous medical follow-up. Type 2 diabetes is a chronic disease that changes over time, so treatment may require periodic adjustments — whether to the dose, the combination of medicines or lifestyle habits — always with the aim of maintaining optimal control and reducing the risk of long-term complications.