cilastatin

noun

ci·​la·​stat·​in ˌsī-lə-ˈsta-tᵊn 

variants also cilastatin sodium

: a drug C₁₆H₂₅N₂O₅SNa that is administered intravenously in combination with the antibiotic imipenem in order to increase its effectiveness by inhibiting enzymatic breakdown in the kidney

Five days before admission, the patient was evaluated by an infectious-disease specialist and readmitted to the other hospital for intravenous administration of a three-day course of imipenem–cilastatin …

—Stephen I. Pelton et al., The New England Journal of Medicine

Inclusion of cilastatin makes it possible to use imipenem against urinary tract infections.

—Chemical & Engineering News