Semaglutide
FDA-approved GLP-1 that produced 15% weight loss in trials.
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SemaglutideversusTirzepatide
The two most-searched GLP-1 peptides, side by side — how they act on the body, how they're dosed and titrated, and who each one tends to suit.
Profile dataSide-by-side fieldsReviewed July 13, 2026
01Short answer
Semaglutide and Tirzepatide are different compounds.
This guide compares the same profile fields for both. It does not decide which is better, recommend either compound, or determine whether switching or combining them is appropriate.
02
Specimen cards
Meet the two profiles
Tirzepatide
FDA-approved for weight loss. Patients lose 20%+ of their body weight.
Read the full profile03
Field notes
Compare them side by side
Profile fieldASemaglutideBTirzepatide
Overview
Semaglutide is an FDA-approved GLP-1 receptor agonist that has transformed treatment of obesity and type 2 diabetes. It works by mimicking the hormone GLP-1 to reduce appetite, slow stomach emptying, and improve insulin sensitivit...
Tirzepatide is a dual peptide that mimics GLP-1 and GIP to powerfully suppress appetite, slow digestion, and improve insulin sensitivity, helping many people lose significant weight and control blood sugar.
Safety
Grade B · Good Safety
FDA-approved with well-characterized side effects. GI issues are common but manageable.
Contraindicated in medullary thyroid cancer or MEN 2 syndrome. May cause pancreatitis. Do not mix in the same syringe as other peptides. Inject GLP-1s on their own.
Grade A · Excellent Safety
FDA-approved with extensive clinical trial data. Well-characterized side effect profile.
Common GI side effects typically improve over 4-8 weeks. Titrate slowly to minimize nausea. Not for Type 1 diabetes. Do not mix in the same syringe as other peptides. Inject GLP-1s on their own.
Profile dosing context
Injection: Start 0.25 mg weekly, titrate to 1-2.4 mg weekly. Oral: Start 3 mg daily, up to 14 mg daily
weekly
Ongoing as prescribed
Titrate slowly over months to minimize GI side effects; take oral on empty stomach
2.5 mg weekly, titrating up every 4 weeks
weekly
12-24 weeks per treatment cycle
Start at 2.5 mg and increase slowly (every 4 weeks) to minimize GI side effects. Take at the same time each week.
Requires titration
Yes
Yes
Occasional side effects
- Nausea
- Vomiting
- Diarrhea
- Constipation
- Injection site reactions
- Nausea
- Vomiting
- Diarrhea
- Reduced appetite
- Constipation
- Indigestion
- Injection site reactions
Same fields. No invented certainty.
The comparison pulls from the live peptide profiles used across The Peptide App. Use it to spot differences in documented context, titration notes, and safety flags. Missing data remains missing rather than being inferred.
- Semaglutide
- FDA-approved GLP-1 that produced 15% weight loss in trials.
- Tirzepatide
- FDA-approved for weight loss. Patients lose 20%+ of their body weight.
Useful context, without a protocol.
What's the difference between Semaglutide and Tirzepatide?
Semaglutide and Tirzepatide are distinct compounds and can differ in mechanism, documented profile context, titration notes, evidence, and safety flags. The comparison table shows the same stored fields side by side and leaves unavailable information blank.
Is Semaglutide or Tirzepatide better?
There is no universal answer, and this page does not rank or recommend either compound. A licensed professional can interpret the evidence, product status, and individual context; this page is only a structured research comparison.
Can you take Semaglutide and Tirzepatide together?
Combining peptides can change dosing complexity and risk. This comparison is not medical advice, and it should not be used to start, stop, or combine protocols. A licensed professional is the right person to evaluate whether any combination is appropriate.
This comparison is for research and educational purposes. It does not diagnose, treat, prescribe, or replace guidance from a licensed professional. Always follow the instructions provided with your product.
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