Medical Weight Loss · Kingwood, The Woodlands & New Caney
Semaglutide vs. Tirzepatide: Which Is Right for You?
Both are once-weekly injections that reduce appetite. They differ in how they work, how much weight people lose on average and how they are tolerated.
Side by side
How they compare
Your history, goals, side effects and cost all factor into the choice.
Semaglutide
- Acts on GLP-1
- About 15% average weight loss in its main trial
- Longer track record
- Once-weekly injection
Tirzepatide
- Acts on GIP and GLP-1
- About 20% average weight loss in its main trial
- More weight loss on average in a head-to-head trial
- Once-weekly injection
Choosing
What matters most
In a 2025 head-to-head trial, people on tirzepatide lost about 20% of their body weight on average compared with about 14% on semaglutide over 72 weeks. Side effects were similar, mostly nausea and other stomach symptoms.
The best choice depends on your health history, how you tolerate the medication, availability and cost. Dr. Bernell will walk through the options with you.
We prescribe and monitor GLP-1 weight loss medication for patients from Kingwood, The Woodlands, Porter, Humble and across the Lake Houston area at our New Caney office. Your first visit includes a full evaluation and labs.
Questions
Common questions
Which is better, semaglutide or tirzepatide?
Tirzepatide produced more weight loss on average in a head-to-head trial, but the right choice depends on you.
Can I switch from semaglutide to tirzepatide?
Yes, switching is common. We plan the starting dose based on your current dose and how you have tolerated it.
Do they have the same side effects?
Mostly. Both commonly cause nausea, diarrhea or constipation, especially early and after dose increases.
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