The Voriconazole test is used to measure the levels of this antifungal drug in the blood. Voriconazole is used to treat severe fungal infections, such as invasive aspergillosis. A blood sample is collected and analyzed in the laboratory to determine the actual concentration of the drug, helping doctors assess the effectiveness of the treatment and avoid both overdose or insufficient dosing. This test is especially recommended for patients receiving long-term treatment or those with medical conditions that affect drug absorption, such as liver problems. It helps improve treatment management and ensures patient safety.