<qa>  What is the name of the drug that is used in bronchoscopy?Patients with a preexisting allergy or history of allergic reactions to study or protocol medications. These include, but are not necessarily limited to: IFN-gamma, GM-CSF, azithromycin clarithromycin, ethambutol, rifampin rifabutin, anesthetic agents employed in bronchoscopy, or any yeast-derived products. 