July 21, 2026
Tirzepatide vs. Semaglutide: How to Choose a Medical Weight-Loss Medication
Weight loss & metabolic — designed, not prescribed.
Tirzepatide (Mounjaro, Zepbound) and semaglutide (Ozempic, Wegovy) are both injectable prescription medications used for medical weight loss. Tirzepatide acts on two gut hormones (GIP and GLP-1) while semaglutide acts on one (GLP-1), and in head-to-head research tirzepatide has generally produced greater average weight loss. The right choice depends on your health history, tolerance, and cost — which is why both require evaluation and ongoing supervision by a licensed medical provider.
What are these medications?
Both are part of a class of drugs originally developed for type 2 diabetes that have become central to medically supervised weight management. They work by mimicking hormones your gut releases after eating — reducing appetite, slowing stomach emptying, and helping you feel full sooner and longer. Semaglutide targets the GLP-1 receptor. Tirzepatide is a dual agonist, targeting both GLP-1 and GIP receptors, which is the mechanistic reason it often shows stronger results.
How much weight can you expect to lose?
Results vary from person to person and depend heavily on diet, activity, dose, and how long you stay on treatment. In clinical trials, participants on the higher doses of tirzepatide lost a larger average percentage of body weight than those on semaglutide, though both produced clinically meaningful loss for most participants. No medication guarantees a specific outcome, and weight regain is common when treatment stops without a long-term plan.
What are the common side effects?
The most common side effects for both are gastrointestinal: nausea, diarrhea, constipation, and reduced appetite, usually strongest when starting or increasing the dose and easing over time. Providers typically start low and titrate up slowly to limit this. Both carry a boxed warning related to thyroid C-cell tumors seen in animal studies and are not appropriate for people with a personal or family history of medullary thyroid carcinoma or MEN 2.
How much do they cost?
Cost depends on whether you use a brand-name product, insurance coverage, and dose. Many patients pursuing weight loss (rather than diabetes) find brand-name coverage limited. At Roots, pricing starts with a consultation so your plan is matched to your goals and budget — contact us for current program pricing.
Which one is right for me?
There’s no universal answer. Tirzepatide’s dual mechanism and stronger average results make it a frequent first choice, but semaglutide has a longer real-world track record, and individual tolerance, medical history, and cost can point either way. Roots offers medical weight-loss consultations — including comprehensive blood analysis and body-composition scanning — so your program is built around your physiology.
Frequently asked questions
Can I get tirzepatide or semaglutide through telehealth?
Many patients begin with a medical consultation that can be conducted remotely, followed by supervised treatment. Eligibility and delivery depend on your evaluation and applicable regulations.
How long does it take to work?
Appetite changes often begin within the first weeks, while meaningful weight change typically unfolds over months of consistent, supervised use.
Is it safe to take long term?
For appropriate candidates under medical supervision, these medications are used on an ongoing basis. Long-term use should always be monitored by your provider.
This article is for general education and is not medical advice. Medications discussed require a prescription and medical supervision. Individual results vary. Speak with a licensed provider about what’s right for you.