John le Carre wrote fiction espionage novels. Espionage novels are novels which focus on a spy's life or spying in general. His most famous work is The Spy That Came In from the Cold.
The definition of a ditz is slang for someone who is silly or who seems to have scattered thinking. An example of ditz is a silly dumb person who just giggles all day. ditz. Slang a person thought of as being flighty, eccentric, silly, etc. ditz.
HCTZ stands for hydrochlorothiazide and when this chemical is combined with valsartan, the result is a medication for hypertension. Commercially, the name of the medication is known as Diovan HCT. The medicine is particularly developed for patients who suffer from high blood pressure. Patients with such condition require numerous medications to manage their blood pressure levels.