Indeed, CYP3A4, GST, and UGT metabolize several drugs used by cancer patients for concomitant diseases, such as opioid analgesics (methadone, morphine), macrolide antibacterials (erythromycin, clarithromycin), azole antifungals (itraconazole, miconazole), corticosteroids (prednisone, prednisolone), etc. [40]. Here, SLC35A2 is linked to cancer.