Which medication does not affect FDG uptake?

Mineralocorticoids do not significantly influence FDG (Fluorodeoxyglucose) uptake in positron emission tomography (PET) imaging. FDG is a glucose analog used in PET scans to evaluate metabolic activity in tissues, and its uptake is primarily affected by the metabolic state of the cells, including insulin levels and other hormones that directly influence glucose metabolism.

Glucocorticoids are known to influence metabolism and can impede glucose uptake in some pathways. Thyroid hormones play a crucial role in metabolic regulation, affecting the overall glucose metabolism that could lead to altered FDG uptake in tissues. Beta blockers, while primarily affecting heart rate and blood pressure, can also influence metabolic processes.

In contrast, mineralocorticoids primarily regulate sodium and potassium balance and have little direct effect on glucose metabolism, thereby not altering FDG uptake in a way that would impact PET imaging outcomes.