Eli Lilly’s diabetes medication Mounjaro (tirzepatide) is seeing explosive sales growth, jumping from $187.3 million in the third quarter of 2022 to $1.4 billion in the same period this year. Conversely, sales of Lilly’s Trulicity, another diabetes drug, have declined, dipping from $1.85 billion in Q3 2022 to $1.67 billion in Q3 2023. Mounjaro is…