How Pheochromocytoma Medications Work

Pheochromocytomas are rare tumors of the adrenal gland that produce excess catecholamines, leading to symptoms such as hypertension, headaches, and palpitations. The primary goal of medication therapy is to control these symptoms and prepare the patient for definitive treatment, which is typically surgery.

Medication Classes

• Alpha-blockers: These medications, including phenoxybenzamine and prazosin, work by blocking the effects of catecholamines on alpha-adrenergic receptors. This helps to reduce blood pressure and alleviate symptoms such as sweating and flushing.
• Beta-blockers: Propranolol is a beta-blocker that can be used in conjunction with alpha-blockers to control heart rate and blood pressure.
• Ketoconazole: This medication inhibits steroidogenesis, which can help reduce catecholamine production by the tumor.

Medication Rationale

The use of medications in pheochromocytoma is critical to control symptoms and prepare the patient for surgery. Alpha-blockers are typically initiated first to reduce blood pressure, followed by beta-blockers to control heart rate. Ketoconazole may be used in select cases where catecholamine production is high.