Losing weight can be an uphill battle, even for those who diligently follow a healthy diet and exercise routine. For many, lifestyle changes alone are not enough to overcome metabolic barriers. This is where injectable weight loss medications, commonly known as GLP-1 and GIP injections, have emerged as a powerful tool.
These medications are considered safe and effective for individuals with obesity or excess weight when used under medical supervision. While they can cause temporary side effects like nausea or constipation, these often subside as the body adjusts.
This guide provides a detailed look at how these injections work, the different types available, potential risks, and how to access them through noRxClinic’s private online consultation service.
What are weight loss injections?
Weight loss injections are prescription medications administered via a small needle under the skin. They are designed to assist with weight loss and long-term weight management by targeting the hormones that regulate appetite and blood sugar.
The U.S. Food and Drug Administration (FDA) has approved several injectable medications specifically for obesity:
- Wegovy®: Contains semaglutide.
- Saxenda®: Contains liraglutide.
- Zepbound®: Contains tirzepatide.
Additionally, some medications approved for type 2 diabetes are frequently prescribed off-label for weight loss. Off-label prescribing is a legal and common medical practice where a doctor uses an FDA-approved drug for a condition other than its original indication. Common diabetes injections used off-label for weight loss include:
- Ozempic®: Semaglutide.
- Victoza®: Liraglutide.
- Mounjaro®: Tirzepatide.
Most of these drugs belong to the class of GLP-1 receptor agonists. They mimic the GLP-1 hormone, which is naturally released in the gut after eating. This hormone signals the brain to reduce appetite, increase feelings of fullness, and stimulate insulin production to lower blood sugar.
It is important to note that these injections are not magic bullets. They are most effective when combined with healthy lifestyle changes, including a nutritious diet and regular physical activity.
Types of weight loss injections
These medications are typically self-administered at home, either once daily or once weekly. The three main types differ in their active ingredients and frequency of administration.
Semaglutide injections
Semaglutide is the active ingredient in Ozempic® (approved for diabetes) and Wegovy® (approved for weight loss).
- Mechanism: It is a GLP-1 receptor agonist that targets the brain’s appetite centers.
- Frequency: Injected once a week.
- Approval: Ozempic was approved in 2017; Wegovy received approval for weight management in 2021.
Liraglutide injections
Liraglutide is the active ingredient in Saxenda (approved for weight loss) and Victoza (approved for diabetes).
- Mechanism: Like semaglutide, it is a GLP-1 receptor agonist that suppresses appetite.
- Frequency: Injected once daily.
- Difference: The daily dosing schedule distinguishes it from the weekly semaglutide options.
Tirzepatide injections
Tirzepatide is the active ingredient in Mounjaro (approved for diabetes) and Zepbound (approved for weight loss).
- Mechanism: This is a dual agonist, meaning it targets two receptors: GLP-1 and GIP (glucose-dependent insulinotropic polypeptide).
- Effect: By mimicking both hormones, it may produce a stronger reduction in appetite and food intake compared to single-agonist drugs.
- Frequency: Injected once a week.
How to get weight loss injections
Accessing these medications requires a valid prescription from a licensed healthcare provider. While you can visit a clinic in person, many patients now opt for online telehealth platforms for convenience and privacy.
The process typically involves:
- Online Assessment: Completing a detailed intake form about your weight history, medical background, and goals.
- Clinician Evaluation: A licensed provider reviews your information to determine eligibility. This often involves calculating your Body Mass Index (BMI).
- Prescription: If you qualify, the provider writes a prescription.
- Delivery: Medications are shipped directly to your door in discreet packaging.
At noRxClinic, we offer a streamlined email consultation process. You can discuss your goals and medical history securely via email, avoiding the need for video calls or clinic visits. Our providers can evaluate your eligibility and guide you through the next steps.
Side effects of weight loss injections
While generally safe, these medications can cause side effects, particularly when starting treatment or increasing the dose.
Common side effects
Most side effects are gastrointestinal and tend to improve within a few weeks:
- Nausea
- Diarrhea or constipation
- Vomiting
- Heartburn or indigestion
- Fatigue or dizziness
- Headaches
- Injection site reactions (redness or itching)
Serious risks
Though rare, more serious complications can occur:
- Pancreatitis: Inflammation of the pancreas.
- Gallbladder disease: Including gallstones.
- Kidney issues: Particularly if dehydration occurs due to vomiting.
- Thyroid tumors: Animal studies showed a risk of medullary thyroid carcinoma (MTC), though this has not been confirmed in humans.
- Heart rate changes: Mild tachycardia (fast heartbeat) has been reported.
Contraindications
These medications may not be suitable for everyone. Providers typically avoid prescribing them to individuals with:
- A personal or family history of medullary thyroid carcinoma (MTC).
- Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).
- A history of pancreatitis.
- Severe kidney disease.
- Type 1 diabetes.
Additionally, because these drugs delay stomach emptying, they can affect the absorption of other medications, such as oral contraceptives. It is crucial to discuss all current medications with your provider.
Which injection is best for weight loss?
There is no single “best” injection for everyone; the ideal choice depends on your health profile, lifestyle, and how your body responds to the medication.
However, clinical trials have offered some comparisons:
- Wegovy vs. Saxenda: A study comparing the two found that once-weekly Wegovy (semaglutide) led to greater weight loss (average 15.8%) compared to once-daily Saxenda (liraglutide, average 6.4%) over 68 weeks.
- Tirzepatide vs. Semaglutide: Research suggests that tirzepatide (Zepbound/Mounjaro) may result in even greater weight loss than semaglutide, though it may also carry a slightly higher risk of gastrointestinal side effects.
Ultimately, the “best” medication is the one that is safe for you, fits your budget, and aligns with your treatment goals.
Cost of weight loss injections
The cost of brand-name weight loss injections can be significant, often ranging from 900to1,500 per month without insurance coverage.
- Wegovy®: ~$1,450/month
- Saxenda: ~$1,450/month
- Zepbound: ~$1,170/month
- Ozempic®: ~$1,075/month
- Mounjaro: ~$1,163/month
- Victoza: ~$590/month
Insurance coverage for weight loss medications is inconsistent. Many plans do not cover drugs prescribed specifically for weight management, though they may cover them if prescribed for diabetes.
At noRxClinic, we aim to make treatment accessible. Our pricing structures often include the consultation, ongoing support, and shipping, potentially offering a more predictable cost than traditional pharmacy routes. We also accept HSA/FSA funds where applicable, which can help offset expenses.
Final thoughts on weight loss injections
Weight loss injections represent a significant advancement in the treatment of obesity. By leveraging hormones that regulate appetite, they can help individuals achieve and maintain a healthier weight when combined with lifestyle changes.
However, they are not a permanent fix. Studies show that weight can be regained if the medication is stopped, highlighting the importance of long-term commitment to both the treatment and healthy habits.
noRxClinic offers private online consultation to help you determine if you are a candidate for these treatments. Our providers communicate via secure email to review your history, discuss risks and benefits, and create a personalized care plan without the need for a clinic visit or video call.
Take the first step toward your weight loss goals today.
Sources (6)
- Aronne LJ, et al. (2023). Continued treatment with tirzepatide for maintenance of weight reduction in adults with obesity. JAMA Network. https://jamanetwork.com/journals/jama/fullarticle/2812936
- Collins LO, et al. (2024). Glucagon-like peptide-1 receptor agonists. NCBI Books. https://www.ncbi.nlm.nih.gov/books/NBK551568/
- Frías JP, et al. (2021). Tirzepatide versus semaglutide once weekly in patients with type 2 diabetes. New England Journal of Medicine. https://www.nejm.org/doi/10.1056/NEJMoa2107519
- Rubino DM, et al. (2022). Effect of weekly subcutaneous semaglutide vs daily liraglutide on body weight in adults with overweight or obesity without diabetes. NCBI PMC. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8753508/
- U.S. Food and Drug Administration (FDA). (2021). FDA approves new drug treatment for chronic weight management. FDA News. https://www.fda.gov/news-events/press-announcements/fda-approves-new-drug-treatment-chronic-weight-management-first-2014
- Zhou Q, et al. (2023). Efficacy and safety of tirzepatide, dual GLP-1/GIP receptor agonists, in the management of type 2 diabetes. NCBI PMC. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10614386/
Leave a Reply