fda warning compounded tirzepatide safety Eli Lilly just issued a public to the compounding industry. In a recent open letter, the pharmaceutical company raised concerns about products being combined with vitamin B12 and marketed in Compounded Semaglutide & Tirzepatide 2025:

For Wegovy dosages, the injectable versions doses are 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, 2.4 mg, and 7.2 mg

People who are older or already have low muscle mass before starting treatment face the highest risk because they have less reserve to spare

Patients not on treatment or on other antihyperglycemic agents entered a run-in treatment period of up to 12 weeks duration with metformin monotherapy (dose of 1500 mg per day) which included washout of medications other than metformin, if applicable

This metabolic shift helps support fat loss, but it may also lead to low energy, fatigue, or reduced workout performance for some people especially beginners