A 48-year-old patient is admitted to hospice. He has an...

A 48-year-old patient is admitted to hospice. He has an aggressive form of brain cancer. $\mathrm{He}$ is having nausea and vomiting at least five times per day. He is also complaining of increasing headaches and pain on the right side of the head near the temporal lobe. The hospice physician has prescribed dexamethasone sodium phosphate (Decadron) $16 \mathrm{mg}$ IM. - Why has dexamethasone sodium phosphate been ordered for this patient? - What is the action of dexamethasone?

A 48-year-old patient is admitted to hospice. He has an aggressive form of brain cancer. $\mathrm{He}$ is having nausea and vomiting at least five times per day. He is also complaining of increasing headaches and pain on the right side of the head near the temporal lobe. The hospice physician has prescribed dexamethasone sodium phosphate (Decadron) $16 \mathrm{mg}$ IM.
- Why has dexamethasone sodium phosphate been ordered for this patient?
- What is the action of dexamethasone?

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Key Concepts

Corticosteroids

Corticosteroids are a class of steroid hormones that mimic the effects of hormones produced by the adrenal cortex. They are widely used for their anti-inflammatory and immunosuppressive properties. In the context of brain cancer, their ability to reduce inflammation and decrease capillary permeability makes them effective in reducing edema, thereby alleviating pressure and pain due to swelling in brain tissues.

Cerebral Edema

Cerebral edema is the accumulation of excess fluid in the brain tissue, which leads to increased intracranial pressure. This condition can exacerbate symptoms such as headaches, nausea, vomiting, and focal neurological deficits. Managing cerebral edema is critical in patients with brain tumors, as reducing the swelling can relieve symptoms and improve overall quality of life.

Anti-Inflammatory Mechanism of Dexamethasone

Dexamethasone works by binding to glucocorticoid receptors, leading to changes in the expression of various genes associated with the inflammatory response. This results in decreased production of inflammatory mediators and reduced capillary permeability. The net effect is the reduction of inflammation and edema, which is particularly beneficial in conditions where swelling in the brain is contributing to neurological symptoms.

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