February 2, 2026: FDA Posts Updated Safety Label for Mounjaro On January 20, 2026, the FDA posted an updated safety/warning label with new patient information for those taking Mounjaro (tirzepatide)
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Nat Rev Neurosci 12(2):6572
Subsequent multiple linear regression analysis, using muscle mass loss as the dependent variable and Semaglutide dosage, baseline ASMI, handgrip strength, and gait speed as independent variables, confirmed independent associations for semaglutide dosage, baseline ASMI, and gait speed, whereas handgrip strength lost statistical significance
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They highlight that inadvertent intravascular injection, high cumulative dosing, and patient factors (extremes of age, cardiac, hepatic, or renal disease, pregnancy) are major contributors, and that bupivacaine carries the greatest cardiotoxic risk