Tirzepatide for Weight Loss

Tirzepatide (brand: Zepbound) is a once-weekly injectable medication used for weight loss and weight management, especially in adults with obesity or weight-related conditions like obstructive sleep apnea. It works by reducing appetite, increasing fullness, and slowing how quickly the stomach empties, which helps lower overall calorie intake.

Tirzepatide is a dual-action drug that targets both GIP and GLP-1 receptors, meaning it mimics natural hormones involved in blood sugar control and hunger regulation. It is self-administered under the skin using a pen or vial and is meant to be combined with a healthy diet and regular exercise.

Things to know about tirzepatide

• FDA-approved for weight management in adults with obesity or overweight with related conditions

• Prescription-only medication

• Taken once weekly

• Can lead to significant weight loss (up to ~22.5% over time in studies)

• Not suitable for type 1 diabetes

Who Can Use It?

• Adults with obesity

• Adults who are overweight with related health conditions

• Adults with obesity and severe obstructive sleep apnea

(Tirzepatide is also sold as Mounjaro for type 2 diabetes.)

How It Works

Tirzepatide activates both GIP and GLP-1 receptors, helping to:

• Suppress appetite

• Increase satiety (feeling full)

• Slow digestion

• Improve insulin response and sensitivity

• Up to ~52 lbs (22.5%) average weight loss over 72 weeks at higher doses

• Significantly greater weight loss compared to semaglutide in clinical trials

Side effects of Tirzepatide

• Nausea

• Diarrhea

• Vomiting

• Constipation

• Fatigue

• Injection site reactions

Serious Risks (Less Common)

• Pancreatitis (severe abdominal pain)

• Gallbladder issues

• Kidney problems due to dehydration

• Low blood sugar (especially with other diabetes meds)

• Thyroid-related concerns

• Allergic reactions

Overall, tirzepatide stands out due to its dual hormone action, making it one of the most effective options currently studied for weight loss and metabolic health.