Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Tirzepatide (Zepbound) and liraglutide (Saxenda) are both medications used to help with weight loss in adults, and they belong to the class of glucagon-like peptide-1 (GLP-1) receptor agonists. However, they have some differences. Tirzepatide is also a glucose-dependent insulinotropic polypeptide (GIP) receptor agonist, while liraglutide is solely a GLP-1 agonist. Tirzepatide is approved for weight management and moderate-to-severe sleep apnea, whereas liraglutide is approved for weight management in adults and children over 12 years old. Tirzepatide is injected once a week, while liraglutide is injected daily. Both medications can cause side effects like nausea, diarrhea, and injection site reactions. Additionally, both tirzepatide and liraglutide have potential interactions with diabetes medications, warfarin (Jantoven, Coumadin), and birth control pills. Both medications are not recommended for people with a history of certain thyroid cancers.
Zepbound (tirzepatide)
Saxenda (liraglutide)
Zepbound (tirzepatide)
Saxenda (liraglutide)
Summary of Zepbound vs. Saxenda
Summary for GIP and GLP-1 agonist
Prescription only
Zepbound (tirzepatide) is an injectable medication that's used along with diet and exercise. It helps with weight loss in adults who meet criteria for weight management therapy. It's also approved to treat moderate-to-severe sleep apnea. This medication belongs to the drug class called GIP and GLP-1 agonists. The dosage is 1 injection under the skin once a week. Common side effects include nausea, diarrhea, and injection site reactions. Zepbound (tirzepatide) is only available as a brand-name medication.
Summary for GLP-1 agonist
Prescription only
Saxenda (liraglutide) is used along with a balanced diet and exercise to help with weight loss in certain adults and children. This prescription weight loss medication is a glucagon-like peptide-1 (GLP-1) receptor agonist. It works by slowing down your gut and making you feel less hungry. Saxenda (liraglutide) is a prefilled pen of medication that's injected once daily under the skin on the stomach or thighs. You can inject Saxenda (liraglutide) at home by yourself after your healthcare professional (HCP) trains you on how to prepare and use it. Some common side effects include nausea, vomiting, and diarrhea.