The Pros and Cons of Using GLP-1 Drugs
- Dietitian Shar, MS, RD

- Dec 4
- 4 min read

What are GLP-1 Drugs?
GLP-1 drugs, or glucagon-like peptide-1 receptor agonists, represent a class of medications that are primarily used in the management of type 2 diabetes. These drugs mimic the action of the naturally occurring hormone GLP-1, which is secreted by the intestines in response to food intake. Their primary function is to enhance insulin secretion in a glucose-dependent manner, which means they stimulate insulin release only when blood sugar levels are elevated. This mechanism helps to lower blood sugar levels effectively while reducing the risk of hypoglycemia, a common concern with other diabetes treatments. In addition to stimulating insulin secretion, GLP-1 drugs also play a crucial role in slowing gastric emptying. By delaying the rate at which food leaves the stomach, these medications help to promote a feeling of fullness, which can aid in weight management—a significant benefit for many individuals with type 2 diabetes who may also struggle with obesity. This appetite-suppressing effect is one of the reasons why GLP-1 receptor agonists have gained attention not only for their glucose-lowering properties but also for their potential in weight loss. Moreover, GLP-1 drugs have been associated with various cardiovascular benefits.
Clinical studies have indicated that these medications can reduce the risk of major adverse cardiovascular events in patients with type 2 diabetes who have established cardiovascular disease or are at high risk for such conditions. This additional benefit makes GLP-1 receptor agonists an attractive option for many healthcare providers when considering treatment plans for their patients. Common examples of GLP-1 drugs include liraglutide, semaglutide, and dulaglutide. Each of these medications has its unique dosing schedule and administration method, with some available as weekly injections, which can improve adherence to treatment regimens. The introduction of oral formulations, like oral semaglutide, has also expanded accessibility for patients who may prefer not to use injections. Despite their advantages, GLP-1 drugs are not without side effects. Some of the most commonly reported adverse effects include gastrointestinal issues such as nausea, vomiting, and diarrhea. These side effects often diminish over time as the body adjusts to the medication.
Additionally, there are contraindications for certain individuals, such as those with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2, as there is a potential risk of thyroid tumors associated with these drugs. In summary, GLP-1 drugs are a powerful tool in the treatment of type 2 diabetes, offering a multifaceted approach to manage blood sugar levels while also providing benefits related to weight loss and cardiovascular health. As research continues to evolve, these medications may play an even more significant role in diabetes management and obesity treatment in the future.
Pros of GLP-1 Drugs for Weight Loss
Effective Weight Loss: Clinical studies have shown that GLP-1 drugs can lead to significant weight loss in individuals, particularly when combined with lifestyle changes.
Improved Blood Sugar Control: These medications can help regulate blood sugar levels, which is beneficial for individuals with type 2 diabetes.
Reduced Appetite: GLP-1 drugs can decrease appetite, making it easier for individuals to adhere to a calorie-restricted diet.
Cardiovascular Benefits: Some studies suggest that GLP-1 drugs may have cardiovascular benefits, reducing the risk of heart disease.
Long-lasting Effects: The effects of GLP-1 drugs can be sustained over time, leading to continued weight management.
Cons of GLP-1 Drugs for Weight Loss
Side Effects: Common side effects include nausea, vomiting, diarrhea, and abdominal pain, which may deter some individuals from using these medications.
Cost: GLP-1 drugs can be expensive, and not all insurance plans may cover them for weight loss purposes.
Long-term Safety: While generally considered safe, the long-term effects of GLP-1 drugs for weight loss are still being studied.
Potential for Dependency: Some individuals may become reliant on medication for weight management rather than adopting sustainable lifestyle changes.
Not Suitable for Everyone: GLP-1 drugs may not be appropriate for individuals with certain medical conditions or those on specific medications.
Conclusion
The long-term effects of these medications are still under investigation, and there may be concerns about their impact on pancreatic health or other metabolic processes.
In light of these considerations, it is vital for those interested in GLP-1 medications to consult a healthcare professional. A comprehensive assessment of personal health needs, including medical history, current health status, and specific weight loss objectives, is essential in determining the most appropriate approach. A healthcare provider can evaluate whether GLP-1 medications are a suitable option, taking into account individual circumstances and potential contraindications. Additionally, they can offer guidance on incorporating these medications into a complete weight management plan that includes lifestyle changes such as dietary adjustments and physical activity.
In conclusion, while GLP-1 medications provide a new and effective method for weight loss and diabetes management, it is crucial to balance their benefits against potential risks and engage in an informed discussion with healthcare professionals. This collaborative approach ensures that individuals can make informed decisions tailored to their unique health needs and wellness goals.
References:
Davies, M., D'Alessio, D. A., Fradkin, J., et al. (2018). Management of Hyperglycemia in Type 2 Diabetes, 2018. Standards of Medical Care in Diabetes, 41(Supplement 1), S55-S64.
Marso, S. P., Bain, S. C., Consoli, A., et al. (2016). Semaglutide and Cardiovascular Outcomes in Patients with Type 2 Diabetes. New England Journal of Medicine, 375(19), 1834-1844.
Wilding, J. P. H., Batterham, R. L., Calanna, S., et al. (2021). Once-weekly semaglutide in adults with overweight or obesity. New England Journal of Medicine, 384(11), 989-1002.








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