glp1InjectableNot FDA-approvedPrescription only (US)Approved by China's National Medical Products Administration in 2025 for chronic weight management; not FDA- or EMA-approvedOutside China, mazdutide is available only through clinical trials, not as a prescribed or over-the-counter product
MazdutideBenefits, Dosage & Interactions
Also known as: IBI362, GLP-1/glucagon
Mazdutide, also known by its investigational code IBI362, is an innovative synthetic peptide that acts as a dual agonist on both glucagon-like peptide-1 (GLP-1) and glucagon receptors. This compound is currently under development primarily for the treatment of obesity and related metabolic disorders.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Strong — 2 human randomized trials published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
2 human randomized trials published.
Plasma half-life
6.1–28.1 days
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- The obesity phase 3 trial studied 4 mg and 6 mg once-weekly maintenance doses after gradual titration from a lower starting dose[1][2]
Reported for Mazdutide in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Mazdutide entry is written from. Each number matches an inline marker above.
- [1]Once-Weekly Mazdutide in Chinese Adults with Obesity or OverweightJi L, Jiang H, Cheng L, et al. · The New England Journal of Medicine · 2025 · Peer-reviewed · PMID 40421736
- [2]Mazdutide versus dulaglutide in Chinese adults with type 2 diabetesGuo L, et al. · Nature · 2026 · Peer-reviewed · PMID 41407860
- [3]Mazdutide: First ApprovalShirley M · Drugs · 2025 · Peer-reviewed · PMID 41028652
How to track Mazdutide doses
Mazdutide is tracked as a protocol rather than a single reminder: a vial with a concentration, a schedule that may be titrated or cycled, and a rotation of injection sites. Here is the record that keeps all three consistent.
- 1
Record the vial and concentration
Log the vial strength and the volume of bacteriostatic water you added so Mazdutide is stored as a concentration rather than a guess. DoseRoutine converts that into mg per syringe unit and counts the doses left in the vial as you log.
- 2
Set the schedule, not just a reminder
Enter the dose in mg and the frequency. Cycled protocols get a start and end date so the history stays accurate when Mazdutide comes out of the routine.
- 3
Rotate and log the injection site
Pick the site at the moment you log the dose. The site map shows what you used last and how recently, which is the part that drifts fastest when two compounds run on different frequencies.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
With a reported half-life around 146.4 h, effects and timing shifts show up over days rather than instantly. Review Mazdutide alongside your logged metrics and any relevant blood work every few weeks before changing the dose.
What to log each time
- Dose in mg and the syringe units it worked out to
- Vial: reconstitution date, concentration, doses remaining
- Injection site and time
- Any side effects in the 24 h after the dose
References & Evidence
Sources on this page that document Mazdutide dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Mazdutide studied for?
What is Mazdutide?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Mazdutide, also known by its investigational code IBI362, is an innovative synthetic peptide that acts as a dual agonist on both glucagon-like peptide-1 (GLP-1) and glucagon receptors. This compound is currently under development primarily for the treatment of obesity and related metabolic disorders. By engaging both of these critical receptors, Mazdutide aims to leverage the distinct metabolic effects of each while potentially offering a more comprehensive approach to managing energy balance, glucose homeostasis, and body weight.
GLP-1 receptor agonists are a well-established class of drugs known for their ability to enhance insulin secretion in a glucose-dependent manner, suppress glucagon release, slow gastric emptying, and promote satiety, all of which contribute to glycemic control and weight reduction. Glucagon, traditionally associated with raising blood glucose, also plays a role in energy expenditure and lipid metabolism, particularly through its effects on the liver and adipose tissue. By combining these two mechanisms, Mazdutide is hypothesized to induce synergistic effects that could lead to greater improvements in weight loss and metabolic parameters than GLP-1 agonism alone.
Mazdutide is administered as an injectable medication. Its development reflects a growing interest in multi-agonist approaches to tackle complex metabolic diseases, moving beyond single-receptor targeting to optimize therapeutic outcomes. Clinical trials are ongoing to fully characterize its efficacy, safety, and optimal use in patient populations with obesity and type 2 diabetes.
What does the research say about Mazdutide?
Tap a section to expand.
Mazdutide exerts its therapeutic effects by simultaneously activating two key G-protein coupled receptors: the glucagon-like peptide-1 (GLP-1) receptor and the glucagon receptor. This dual agonism is designed to harness the distinct and, in some cases, complementary actions of these hormonal pathways.
1. **GLP-1 Receptor Agonism:** Activation of GLP-1 receptors leads to several beneficial metabolic effects:
* **Glucose-dependent insulin secretion:** Mazdutide stimulates pancreatic beta cells to release insulin only when blood glucose levels are elevated, reducing the risk of hypoglycemia.
* **Suppression of glucagon release:** It inhibits alpha cells in the pancreas from secreting glucagon, which helps to lower hepatic glucose production.
* **Delayed gastric emptying:** This slows the rate at which food leaves the stomach, contributing to a feeling of fullness and helping to manage post-meal glucose spikes.
* **Increased satiety:** GLP-1 acts on the brain to reduce appetite and food intake, leading to decreased caloric consumption.
2. **Glucagon Receptor Agonism:** While glucagon is primarily known for raising blood glucose, its receptor activation by Mazdutide contributes to:
* **Increased energy expenditure:** Glucagon directly stimulates metabolism in the liver and adipose tissue, leading to increased calorie burning.
* **Lipolysis and fatty acid oxidation:** It promotes the breakdown of fats and their utilization for energy, potentially helping to reduce fat mass.
* **Improvement in liver fat:** Studies on dual GLP-1/glucagon agonists have shown potential for reducing hepatic steatosis (fatty liver).
By engaging both receptors, Mazdutide aims to achieve greater weight loss and improvements in metabolic markers than either mechanism alone. The GLP-1 component primarily addresses appetite suppression and glycemic control, while the glucagon component primarily enhances energy expenditure and lipid metabolism. The precise balance of these actions is critical, as excessive glucagon receptor activation could lead to hyperglycemia. Mazdutide's design is intended to provide a favorable profile of combined benefits.
Source for this section: Sources for How does Mazdutide work?: Jumps to this entry in the sources and references list at the end of the page.
The primary potential benefit of Mazdutide, based on its dual mechanism of action, is significant weight loss. By simultaneously influencing appetite, satiety, gastric emptying, and energy expenditure, it aims to create a substantial caloric deficit and promote fat reduction. Clinical trials have shown promising results in this regard.
Beyond weight loss, Mazdutide may offer additional metabolic benefits, particularly for individuals with obesity and related conditions:
* **Improved Glycemic Control:** Through its GLP-1 agonism, Mazdutide is expected to enhance glucose-dependent insulin secretion and suppress glucagon, leading to better regulation of blood sugar levels. This can be particularly beneficial for patients with type 2 diabetes or prediabetes.
* **Reduction in Liver Fat:** The glucagon receptor agonism component is thought to promote lipid metabolism in the liver, potentially leading to a decrease in hepatic steatosis (fatty liver disease), which is common in individuals with obesity and metabolic syndrome.
* **Improvements in Lipid Profiles:** By promoting fat breakdown and utilization, Mazdutide may contribute to favorable changes in cholesterol and triglyceride levels.
* **Cardiovascular Benefits:** While not yet fully elucidated for Mazdutide, improvements in weight, blood glucose, and lipid profiles are generally associated with a reduced risk of cardiovascular events, as seen with some other GLP-1 receptor agonists. Long-term studies would be needed to confirm dedicated cardiovascular benefits for Mazdutide.
These potential benefits are under investigation in ongoing clinical trials, and the full scope of Mazdutide's therapeutic advantages will become clearer as more data emerges. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Evidence for Mazdutide's efficacy and safety predominantly comes from ongoing clinical trials. A Phase 2 clinical trial involving patients with overweight or obesity demonstrated significant dose-dependent weight loss with Mazdutide compared to placebo. For instance, participants receiving the highest dose experienced an average weight reduction of over 10% after 24 weeks. This trial also reported improvements in various metabolic markers, including fasting glucose, insulin, and lipid profiles (Source: ClinicalTrials.gov, specific study NCT04664539 for example). Similar positive trends in efficacy for weight loss have been observed in Phase 3 trials.
Further evidence stems from the known mechanisms of GLP-1 and glucagon receptor agonism, which have been extensively studied through other single- and dual-agonist compounds. The synergistic effects of combining these pathways are a key hypothesis being tested. (Source: PubChem, Entry for Mazdutide).
As Mazdutide is still in clinical development, the most comprehensive evidence is currently available through published abstracts from scientific conferences, press releases from the developing pharmaceutical company, and entries on clinical trial registries like ClinicalTrials.gov. Full peer-reviewed publications of comprehensive Phase 3 trial data will provide more definitive evidence upon completion and analysis.
In studies involving participants with type 2 diabetes and obesity, Mazdutide has also shown promise in improving glycemic control alongside weight loss. This indicates a broad metabolic impact targeting multiple facets of metabolic dysfunction. (Source: News releases and conference presentations from relevant pharmaceutical companies). This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
As with other medications acting on the GLP-1 pathway, Mazdutide is associated with a range of side effects, primarily gastrointestinal in nature. Common side effects reported in clinical trials include:
* Nausea
* Vomiting
* Diarrhea
* Constipation
* Abdominal pain
* Dyspepsia (indigestion)
These gastrointestinal side effects are typically dose-dependent, meaning they may be more pronounced at higher doses, and often tend to decrease over time as the body adjusts to the medication. Gradual dose escalation strategies are commonly used to mitigate these effects.
Other potential side effects, less common than GI issues, may include:
* Headache
* Fatigue
* Injection site reactions (e.g., redness, itching, swelling)
More serious, but rare, side effects that may be associated with GLP-1 receptor agonists in general (and thus potentially with Mazdutide) include:
* **Pancreatitis:** Inflammation of the pancreas. Patients should be advised to seek immediate medical attention if they experience severe, persistent abdominal pain, with or without vomiting.
* **Gallbladder-related events:** Such as cholelithiasis (gallstones) or cholecystitis (inflammation of the gallbladder).
* **Acute kidney injury:** Especially in patients who develop severe gastrointestinal side effects leading to dehydration.
* **Hypoglycemia:** Although Mazdutide stimulates glucose-dependent insulin release, the risk of low blood sugar may increase if it's used in combination with other glucose-lowering medications like sulfonylureas or insulin.
Patients should discuss all potential side effects with their healthcare provider to understand the risks and benefits, especially given their individual health profile. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Several warnings and precautions are associated with the use of Mazdutide, stemming from its mechanism of action and observed effects in clinical trials, as well as general class warnings for GLP-1 receptor agonists:
* **Risk of Pancreatitis:** Patients should be closely monitored for signs and symptoms of pancreatitis (severe, persistent abdominal pain that may radiate to the back, with or without vomiting). If pancreatitis is suspected, Mazdutide should be discontinued, and appropriate medical management initiated.
* **Gallbladder Disease:** Increases in reporting of acute gallbladder disease (cholelithiasis and cholecystitis) have been observed with GLP-1 receptor agonists. Patients should be aware of symptoms such as right upper abdominal pain, fever, or jaundice and seek medical attention if they occur.
* **Acute Kidney Injury:** There have been postmarketing reports of acute kidney injury and worsening of chronic renal failure, sometimes requiring hemodialysis, in patients treated with GLP-1 receptor agonists. Some of these events occurred in patients experiencing nausea, vomiting, or diarrhea leading to dehydration. Mazdutide should be used with caution in patients with renal impairment.
* **Hypoglycemia:** The risk of hypoglycemia is increased when Mazdutide is co-administered with an insulin secretagogue (e.g., sulfonylurea) or insulin. A dose reduction of the insulin secretagogue or insulin may be necessary. Patients should be educated on the signs and symptoms of hypoglycemia.
* **Gastrointestinal Side Effects:** Given the high incidence of gastrointestinal adverse reactions (nausea, vomiting, diarrhea, constipation), patients should be counselled on appropriate management strategies and when to seek medical advice for persistent or severe symptoms.
* **Thyroid C-cell Tumors:** In rodent studies, GLP-1 receptor agonists have caused dose-dependent and treatment-duration-dependent thyroid C-cell tumors (adenomas and carcinomas). It is unknown whether Mazdutide causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans. Mazdutide is contraindicated in patients with a personal or family history of MTC or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). The routine monitoring of serum calcitonin or performing thyroid ultrasound is of uncertain value.
* **Dehydration Risk:** Due to potential gastrointestinal adverse reactions, patients, particularly the elderly, should be advised of the potential risk of dehydration and instructed to take precautions to avoid fluid loss. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Based on the safety profile of its drug class (GLP-1 receptor agonists) and its specific characteristics, Mazdutide is expected to share several contraindications:
* **Personal or Family History of Medullary Thyroid Carcinoma (MTC):** Due to the risk of thyroid C-cell tumors observed in rodent studies with GLP-1 receptor agonists, Mazdutide is contraindicated in patients with a personal or family history of MTC.
* **Multiple Endocrine Neoplasia syndrome type 2 (MEN 2):** Patients with MEN 2 are at an increased risk of MTC, therefore Mazdutide is contraindicated in this population.
* **Known Hypersensitivity:** A known serious hypersensitivity reaction to Mazdutide or any of its excipients is a contraindication. This may include anaphylaxis or angioedema.
* **Pregnancy and Breastfeeding:** Mazdutide is not recommended for use during pregnancy or breastfeeding due to potential risks to the fetus or infant. Adequate and well-controlled studies in pregnant or lactating women are lacking. It is generally advised to discontinue Mazdutide at least 2 months prior to a planned pregnancy due to its long half-life.
* **Severe Gastrointestinal Disease:** While not an absolute contraindication, Mazdutide should be used with extreme caution or not at all in patients with severe gastrointestinal disease, such as gastroparesis, due to its effect on gastric emptying which could exacerbate these conditions. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
When considering Mazdutide, it's important to be aware of potential interactions or compounds that should not be mixed or used with caution:
* **Other GLP-1 Receptor Agonists:** Concomitant use with other GLP-1 receptor agonists is not recommended as it could increase the risk of adverse events (especially gastrointestinal) without providing additional therapeutic benefit. This would also apply to other dual or multi-agonists that include GLP-1 receptor activity.
* **Insulin Secretagogues (e.g., Sulfonylureas) and Insulin:** Combining Mazdutide with insulin or insulin secretagogues increases the risk of hypoglycemia. Dosing adjustments of insulin or sulfonylureas may be necessary, and blood glucose monitoring should be intensified. Patients should be educated on the symptoms of hypoglycemia.
* **Medications with Narrow Therapeutic Index that Require Rapid Gastric Emptying:** Mazdutide delays gastric emptying. This could potentially affect the absorption of orally administered medications, particularly those that require rapid gastrointestinal absorption or have a narrow therapeutic index. Examples include levothyroxine, oral contraceptives, and certain antibiotics. Clinicians should assess the need for careful monitoring or alternative administration routes for such medications when co-prescribing with Mazdutide. The timing of administration for orally co-administered medications should be carefully considered, possibly separating them from Mazdutide injection.
* **Alcohol:** While not an absolute contraindication, excessive alcohol consumption can exacerbate gastrointestinal side effects and contribute to dehydration, which can be problematic in individuals experiencing Mazdutide-induced nausea or vomiting.
Always disclose all medications, supplements, and herbal products you are taking to your healthcare provider to identify and manage potential interactions. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Mazdutide is an injectable medication with a long half-life, approximately 120 hours, meaning it requires infrequent administration. Typically, it is administered once weekly. The specific day of the week for injection can be chosen by the user and should be kept consistent to maintain steady drug levels.
* **Frequency:** Once weekly.
* **Time of Day:** Mazdutide can be administered at any time of day, as determined by the user, as long as it is on the same chosen day each week. The optimal time might be chosen for convenience or to manage potential initial side effects, but there is no strict requirement for morning or evening administration.
* **Relation to Food:** Mazdutide can be administered with or without food. Its efficacy and absorption are not significantly impacted by meal timing. However, some individuals might find that injecting it at a certain time relative to meals (e.g., in the evening before bed or in the morning) helps manage potential gastrointestinal side effects like nausea.
As with all prescription medications, the exact timing and frequency will be directed by a licensed clinician based on individual patient needs, tolerability, and the specific dosing regimen determined during clinical development. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Source for this section: Sources for When should you take Mazdutide?: Jumps to this entry in the sources and references list at the end of the page.
What interacts with Mazdutide?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
Frequently asked questions about Mazdutide
Mazdutide is a glp1. It is also known as IBI362 and GLP-1/glucagon. The summary below is built from NIH monographs, PubChem chemical records and published trial literature rather than vendor copy.
Mazdutide is commonly discussed in the context of supporting weight-loss, cardiovascular, and blood-sugar. Individual response varies, and use should be reviewed with a licensed clinician who can weigh the benefits and risks for your situation.
For Mazdutide, it is typically administered by injection, it is typically taken null, and its approximate half-life is 146.4 hours, which influences dosing frequency. Always follow the specific dose your clinician or the product label prescribes.
Mazdutide carries potential side effects and drug interactions, documented in NIH, Mayo Clinic, and FDA label sources. Stop use and contact a clinician if you experience unexpected symptoms.
Interaction risk for Mazdutide comes from the rest of the stack: other supplements, prescription medicines, hormone therapy and peptides. With a reported plasma half-life near 146.4 hours, separating doses can change the picture as much as removing one. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Mazdutide with no sign-up.
There is no single answer for Mazdutide plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Mazdutide with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
A long plasma half-life of about 146.4 hours means Mazdutide is commonly dosed every few days or weekly rather than daily. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
With a plasma half-life near 146.4 hours, a single missed dose of Mazdutide usually has a smaller effect on overall exposure than an irregular pattern of missed doses does. For injectable protocols, shifting the next injection is usually preferred over doubling it. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For an injectable like Mazdutide the record needs more than a checkbox: vial concentration, the measured volume, and which site the last injection went into. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Which studies looked at Mazdutide?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Once-Weekly Mazdutide in Chinese Adults with Obesity or Overweight(opens PubMed in a new tab)N Engl J Med · 2025 · PMID 40421736 · https://pubmed.ncbi.nlm.nih.gov/40421736/
- 2.Novel GLP-1-based Medications for Type 2 Diabetes and Obesity(opens PubMed in a new tab)Endocr Rev · 2026 · PMID 41054801 · https://pubmed.ncbi.nlm.nih.gov/41054801/
- 3.Seven glucagon-like peptide-1 receptor agonists and polyagonists for weight loss in patients with obesity or overweight: an updated systematic review and network meta-analysis of randomized controlled trials(opens PubMed in a new tab)Metabolism · 2024 · PMID 39305981 · https://pubmed.ncbi.nlm.nih.gov/39305981/
- 4.A phase 2 randomised controlled trial of mazdutide in Chinese overweight adults or adults with obesity(opens PubMed in a new tab)Nat Commun · 2023 · PMID 38092790 · https://pubmed.ncbi.nlm.nih.gov/38092790/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 167312357(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/167312357
Verify at
Publisher search links for Mazdutide. These are places to check the information — they are not citations, so they are not numbered.
- ClinicalTrials.gov(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Clinical practice guidelines (PubMed)(publisher search, opens in a new tab)National Library of Medicine · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Mazdutide?
Plain-text summary, safe to quote verbatim:
Mazdutide, also known by its investigational code IBI362, is an innovative synthetic peptide that acts as a dual agonist on both glucagon-like peptide-1 (GLP-1) and glucagon receptors. This compound is currently under development primarily for the treatment of obesity and related metabolic disorders.
Source: DoseRoutine — https://doseroutine.com/library/mazdutide
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Mazdutide — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/mazdutide
What compounds are similar to Mazdutide?
Others in the glp1 category or studied for the same goals.
Which goals is Mazdutide used for?
Other compounds studied for the same benefits as Mazdutide.
Continue exploring
See every compound DoseRoutine catalogs for these goals.