Retatrutide Dosing & Reconstitution Guide
Dosing Protocol
Route: Subcutaneous (clinical trial formulation only) Frequency: Once weekly Dose Range: Phase 2 tested 1, 4, 8, 12 mg weekly SC; optimal dose being determined in Phase 3 Cycle Length: Phase 2 was 48 weeks; Phase 3 ongoing Timing: Same day each week
Titration Schedule
Weeks 1–4: 1–2 mg weekly (initiation) Weeks 5–8: 4 mg weekly Weeks 9–12: 8 mg weekly Weeks 13+ (maintenance): 8–12 mg weekly
Storage
Lyophilized: −20 °C (−4 °F) Reconstituted: 2–8 °C (35.6–46.4 °F) Shelf Life: 28 days
Injection Sites
Abdomen, Thigh
Safety & Contraindications
Safety: GI side effects (dose-related, 13-63% across dose groups): nausea, vomiting, diarrhea, constipation; mostly mild to moderate GI events partially mitigated with lower starting dose (2 mg vs 4 mg initial dose) Dose-dependent heart rate increases peaking at 24 weeks, declining thereafter
Contraindications: Not yet established -- product is investigational; Likely similar to GLP-1 class: personal/family history of medullary thyroid carcinoma, MEN2 (precautionary); Pregnancy (based on GLP-1 class)
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Retatrutide Monthly Research Cost in Australia Breakdown
Researching Retatrutide (LY3437943), the most advanced triple GLP-1/GIP/glucagon receptor agonist, involves costs that vary by vial size, dose, and frequency. In Australia, a 10mg vial costs $129.99 AUD ($13.00/mg), while a 20mg vial is $199.99 AUD ($10.00/mg). Supplies like bacteriostatic water and needles add to monthly expenses, with planning around a 4-week reconstituted stability window essential to minimize waste.