The same active ingredient as Mounjaro® and Zepbound® — dual GLP-1 + GIP action for up to 22.5% body weight reduction in clinical trials. Clinician-prescribed and pharmacy-compounded.
Compounded tirzepatide is a next-generation dual-agonist GLP-1/GIP medication produced by licensed compounding pharmacies. It contains the same active ingredient as the brand-name medications Mounjaro (approved for type 2 diabetes) and Zepbound (approved for chronic weight management) — but manufactured by a compounding pharmacy rather than Eli Lilly, the original brand-name manufacturer.
What distinguishes tirzepatide from semaglutide — and makes it the most powerful weight-loss medication currently available — is its dual mechanism. Tirzepatide activates both GLP-1 (glucagon-like peptide-1) and GIP (glucose-dependent insulinotropic polypeptide) receptors simultaneously. GIP is a second gut hormone involved in insulin secretion, fat storage regulation, and energy metabolism. This combined activation produces a more comprehensive metabolic effect than either hormone alone.
For patients, the practical result is a level of appetite suppression and metabolic improvement that consistently exceeds what semaglutide alone produces in head-to-head comparisons. Patients also frequently report greater reductions in waist circumference and improvements in insulin sensitivity alongside the scale weight changes.
Clinical landmark: In the SURMOUNT-1 trial — the pivotal tirzepatide weight management study — participants on the highest dose (15mg/week) lost an average of 22.5% of their body weight over 72 weeks. This is the largest average weight reduction ever recorded for a pharmacological weight-loss treatment in a major clinical trial.
This is the most common question from patients comparing the two LevelsRX medication options. The clinical data is consistent: tirzepatide produces greater weight loss than semaglutide across virtually every measured endpoint.
A 2023 real-world analysis published in JAMA Internal Medicine compared the two medications head-to-head over 12 months. Tirzepatide produced significantly greater weight reduction in every BMI category studied. Patients on tirzepatide were more likely to achieve ≥15% and ≥20% body weight reduction than those on semaglutide.
That said, "better on average" does not mean "right for everyone." Semaglutide remains an excellent first-line option — particularly for patients who prefer the lower price point, want an oral medication format, or are beginning GLP-1 treatment for the first time. Your LevelsRX provider will help determine which medication is most appropriate for your individual health profile and goals.
Disclaimer: Compounded tirzepatide is not FDA-approved as a brand-name product. This content is educational only. Consult a licensed healthcare provider before starting any GLP-1 program.
Compounded tirzepatide is administered as a subcutaneous injection once per week. Common injection sites include the abdomen, upper thigh, and outer upper arm. The injection process is the same as for compounded semaglutide — a short, fine needle and a small volume of medication.
Dosing follows a gradual titration schedule designed to minimize gastrointestinal side effects. Most patients begin at 2.5mg per week and increase by 2.5mg increments every four weeks as tolerated, working toward the dose that produces optimal results with acceptable tolerability. Your LevelsRX provider sets your starting dose and titration schedule.
Tirzepatide's side effect profile is similar to semaglutide, reflecting the shared GLP-1 mechanism. The most common side effects are gastrointestinal and are most pronounced during initial dose escalation:
Serious adverse events are rare but include pancreatitis and gallbladder disease. Tirzepatide should not be used by individuals with a personal or family history of medullary thyroid carcinoma or MEN2. All contraindications are reviewed during your LevelsRX medical intake process.
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