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4 July 2026 · 3 min read

Who Should Not Take Weight Loss Injections?

Weight loss injections can help many people lose weight safely – but they are not suitable for everyone. Knowing who should avoid these medications is essential before starting treatment.

3 Most Important Things to Know

  • Pregnant or breastfeeding women should not use weight loss injections.
  • People with a personal or family history of Medullary Thyroid Cancer (MTC) or MEN2 should avoid GLP-1 weight loss injections.
  • Patients with pancreatitis, severe stomach disorders, or certain other medical conditions should be evaluated by a diabetes specialist before treatment.

Related Article: https://www.fda.gov/drugs/drug-alerts-and-statements/fdas-concerns-unapproved-glp-1-drugs-used-weight-loss


1. Pregnancy and Breastfeeding

Weight Loss Injections Are Not Recommended During Pregnancy and Breastfeeding.

Weight loss injections should not be used during pregnancy or while breastfeeding. If you are planning a pregnancy, discuss alternative weight management strategies with your doctor.

Related reading:

  • Healthy Weight Loss Before Pregnancy
  • Weight Loss and Fertility
  • Obesity and Pregnancy Risks

2. Personal or Family History of Thyroid Cancer

Who Should Avoid GLP-1 Weight Loss Injections?

People with a personal or family history of Medullary Thyroid Cancer (MTC) or Multiple Endocrine Neoplasia Type 2 (MEN2) should generally avoid GLP-1 receptor agonists unless specifically advised by a specialist.

Related reading:

  • Understanding GLP-1 Weight Loss Injections
  • Common Side Effects of Weight Loss Injections
  • Thyroid Disorders: Symptoms and Treatment

3. Certain Medical Conditions

Medical Conditions That Require Specialist Assessment

Weight loss injections may not be suitable for people with:

  • Previous pancreatitis
  • Severe gastroparesis (delayed stomach emptying)
  • Significant gastrointestinal diseases
  • Severe allergic reactions to the medication

A thorough medical assessment helps determine whether treatment is safe and appropriate.

Reach us: https://www.primehealth.ae/prime-medical-center/doctor-profile/al-qasimia/dr-suhail-muhammad-marfani

Related reading:

  • Who Is a Good Candidate for Weight Loss Injections?
  • Obesity and Type 2 Diabetes
  • Fatty Liver Disease and Weight Loss
  • Lifestyle Changes for Sustainable Weight Loss

Take-Home Message

Weight loss injections are highly effective for many people with obesity or type 2 diabetes, but they are not appropriate for everyone. A comprehensive medical assessment by an Internal Medicine and Diabetes Specialist helps ensure safe, effective, and individualized treatment.


Related Medical Articles

You may also find these articles helpful:

  • Who Is the Right Candidate for Weight Loss Injections?
  • How Do GLP-1 Weight Loss Injections Work?
  • Common Side Effects of Weight Loss Injections
  • Weight Loss Injections vs Lifestyle Changes
  • Obesity and Type 2 Diabetes: The Hidden Connection
  • Fatty Liver Disease and Obesity
  • How to Prevent Prediabetes
  • Can Type 2 Diabetes Be Reversed?
  • Best Diet for Weight Loss and Diabetes
  • Exercise for Weight Loss: Where Should You Start?
  • BMI Calculator: Know Your Healthy Weight
  • Waist Circumference and Your Health Risk

References

  1. American Diabetes Association (ADA). Standards of Care in Diabetes – Obesity and Weight Management for the Prevention and Treatment of Type 2 Diabetes.
  2. American Association of Clinical Endocrinology (AACE). Clinical Practice Guidelines for Comprehensive Medical Care of Patients with Obesity.
  3. European Association for the Study of Diabetes (EASD). Management of Hyperglycaemia in Type 2 Diabetes: Consensus Report by the ADA and EASD.
  4. National Institute for Health and Care Excellence (NICE). Obesity: Identification, Assessment and Management (CG189).
  5. U.S. Food and Drug Administration (FDA). Prescribing Information and Safety Warnings for GLP-1 Receptor Agonists and Weight Loss Medications.

Medical disclaimer: This article is for general education only and does not replace personal medical advice. Always consult a qualified clinician about your own health.

Dr. Suhail M. Marfani

Written by Dr. Suhail M. Marfani, Health and Diabetes Physician. Educational information only — discuss your own care with your doctor.

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