Thiotepa Telithromycin
ModerateTaking Thiotepa together with telithromycin can raise the level of Thiotepa in the blood. It may also lower the level of TEPA, the active form that the body makes from Thiotepa. The same effect can happen with other medicines that block CYP2B6 or CYP3A4, such as clopidogrel, ticlopidine, azole antifungals and some other antibiotics like erythromycin and clarithromycin.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.