Trilostane

Trilostane.svg

Trilostane is a medication used in the treatment of Cushing's syndrome and primary hyperaldosteronism. It is classified as an adrenal steroidogenesis inhibitor and works by inhibiting the enzyme 3β-hydroxysteroid dehydrogenase, which is crucial in the synthesis of corticosteroids.

Medical Uses

Trilostane is primarily used to manage Cushing's syndrome, a condition characterized by excessive production of cortisol by the adrenal glands. It is also used in the treatment of primary hyperaldosteronism, a disorder where there is excessive production of aldosterone, leading to hypertension and hypokalemia.

Cushing's Syndrome

Cushing's syndrome can result from various causes, including pituitary adenomas (Cushing's disease), adrenal tumors, and ectopic ACTH syndrome. Trilostane helps reduce cortisol levels, alleviating symptoms such as weight gain, hypertension, diabetes mellitus, and osteoporosis.

Primary Hyperaldosteronism

In cases of primary hyperaldosteronism, trilostane reduces the production of aldosterone, helping to control blood pressure and correct electrolyte imbalances.

Mechanism of Action

Trilostane inhibits the enzyme 3β-hydroxysteroid dehydrogenase, which is involved in the biosynthesis of glucocorticoids, mineralocorticoids, and sex steroids. By blocking this enzyme, trilostane decreases the production of cortisol and aldosterone, leading to a reduction in the symptoms associated with their overproduction.

Side Effects

Common side effects of trilostane include gastrointestinal disturbances such as nausea, vomiting, and diarrhea. Other potential side effects include fatigue, dizziness, and electrolyte imbalances. In rare cases, trilostane can cause adrenal insufficiency, a condition where the adrenal glands do not produce adequate amounts of steroid hormones.

Contraindications

Trilostane is contraindicated in patients with known hypersensitivity to the drug or any of its components. It should also be used with caution in patients with renal impairment or hepatic impairment.

Veterinary Use

Trilostane is also used in veterinary medicine, particularly in the treatment of Cushing's syndrome in dogs. It is one of the few medications approved for this purpose and has been shown to be effective in managing the condition in canine patients.

See Also

• Cushing's syndrome
• Primary hyperaldosteronism
• Adrenal glands
• Corticosteroids
• 3β-hydroxysteroid dehydrogenase