Tirzepatide is a dual-receptor targeted synthetic peptide that has gained significant attention in metabolic research in recent years. Unlike single-target GLP-1 peptides, it acts on both the GIP and GLP-1 signaling pathways, making it a popular choice for university metabolic laboratories and pharmaceutical preclinical research teams.
Based on my experience, inquiries for this raw material have been steadily increasing, but the clients are primarily professional research institutions. It's best to be cautious when dealing with individual buyers. The synthesis and purification process is complex, and high-purity, stable supplies are limited. To reiterate: this raw material is for laboratory in vitro mechanism studies only and is strictly prohibited for human injection, clinical intervention, or health and weight loss applications.
Main Functions and Physical Mechanisms
It activates both the GIP pathway secreted by K cells and the GLP-1 pathway secreted by L cells in the gut, not simply by adding them together:
Glucose-dependent insulin stimulation: It only raises the first/second phase insulin when blood glucose is high, suppressing glucagon; it is less likely to cause hypoglycemia when used alone.
Central appetite suppression: It regulates GIP/GLP-1 receptors in the hypothalamus and reward circuits together, resulting in a more significant reduction in hunger than GLP-1 alone (such as smegglutinin).
Delayed gastric emptying: It makes you feel full after eating a little, indirectly reducing food intake.
Adipose tissue effect: GIP receptor activation increases blood flow to adipose tissue and promotes lipid utilization, complementing the systemic anti-inflammatory/cardioprotective effects of GLP-1. In SURMOUNT-5, obese individuals without diabetes lost an average of 20.2% (approximately 22.8 kg) over 72 weeks, showing superior head-to-head performance compared to smegglutinin.
Physically, it binds to albumin via the C20 diacid side chain, which DPP-4 cannot cleave (the 2nd and 13th positions are replaced with non-natural amino acids, Aib), extending its half-life to approximately 5 days, allowing for weekly administration.
Storage Conditions
Unopened: Refrigerate in its original packaging at 2–8℃, protected from light. Do not freeze. Discard any frozen product even after thawing.
Opened/currently used pen: Store at room temperature ≤30℃, protected from light. It can be stored for 21 days (single-dose pen) or 30 days (multi-dose pen). Discard if it exceeds this timeframe. Do not refrigerate repeatedly.
Taking it out: Store in its original packaging at ≤30℃, protected from light. Maximum storage time: 30 days.
Before administration, check the solution. It should be colorless to pale yellow, clear, and free of particles. Discard any cloudy, discolored solution with suspended matter.
Precautions and Personal Opinions
Absolute Contraindications: Personal/family history of medullary thyroid carcinoma (MTC), MEN 2, severe allergy to peptides or phenol/benzyl alcohol excipients; do not use during pregnancy or breastfeeding; not approved for use in children under 18 years of age in China.
Rapid Incremental Dosage: Start with 2.5 mg, increasing by 2.5 mg every 4 weeks, up to a maximum of 15 mg/week. Many people experience nausea, vomiting, and diarrhea during the two weeks of dosage increases. Small, low-fat meals and hydration can help manage this; forcing a higher dose will only lead to dehydration.
Reduced Dosage When Using with Hypoglycemic Agents: When used with sulfonylureas or insulin, the latter must be reduced to avoid hypoglycemia; when used with oral contraceptives, levothyroxine, or some antibiotics, slow gastric emptying can affect absorption; it is recommended to wait 1 hour after injection before taking these medications.
Beware of Pancreatitis: Persistent, severe abdominal pain radiating to the back, accompanied by vomiting; immediately stop the injection and seek medical attention; those with a history of pancreatitis should not use this medication lightly.
Preoperative notification: Inform the anesthesiologist that you are using this medication before general anesthesia/deep sedation. Slow gastric emptying poses a risk of aspiration. Usually, it should be discontinued one week before elective surgery.
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