I think I read somewhere that they had applied for patents for 20mg and 25 mg doses. Gemini says this, but I haven't checked the references. Hallucinations are a thing.
Yes, Eli Lilly has filed patent applications specifically targeting higher doses and concentrations of tirzepatide (the active ingredient in Mounjaro and Zepbound).
The primary international patent application addressing this is
WO2024006662A1 (titled
"Tirzepatide Compositions and Use"), which was published in early 2024.
Key details from the patent filings reveal how Eli Lilly is preparing for higher-dose formulations:
- Increased Concentration: While the current maximum approved dose of tirzepatide is 15 mg (delivered in a 0.5 mL injection, which equals a concentration of 30 mg/mL), the patent application explicitly claims stable, pharmaceutically acceptable compositions containing greater than 30 mg/mL, and up to 60 mg/mL of tirzepatide.
- Specific Dosing Strengths: The filing specifically details formulation concentrations of 40 mg/mL, 50 mg/mL, 55 mg/mL, and 60 mg/mL. In the standard 0.5 mL injection volume, a 40 mg/mL to 60 mg/mL concentration would translate to higher total doses, such as 20 mg, 25 mg, or 30 mg.
- Stated Purpose: The patent application notes that a significant number of patients require "additional weight management benefit" beyond the currently approved 15 mg maximum. It focuses on the chemical stability needed to keep these denser peptide concentrations shelf-stable for at least 6 months while managing the gastrointestinal side effects associated with higher doses.
By securing these patents, Eli Lilly is laying the legal and regulatory groundwork to eventually introduce stronger versions of Mounjaro and Zepbound if clinical trials show that higher doses provide superior weight loss or glycemic control with acceptable safety profiles.