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2), S420S422 (2009)

Unlike oral medications, which pass through the digestive tract, IM injections work faster because the injected material is deposited deeper into muscle tissue, where there is a rich blood supply

Annu Rev Physiol (2022) 84:43559

The thiazolidinedione drug troglitazone up-regulates nitric oxide synthase expression in vascular endothelial cells
