Precursor to metabolite: Chlordiazepoxide to Nordiazepam

Chlordiazepoxide is converted to Nordiazepam by CYP3A4.

The pair

Chlordiazepoxide — The first benzodiazepine; long-acting, used for alcohol withdrawal.
Nordiazepam — Long-acting active metabolite of diazepam and several other benzodiazepines; accumulation can prolong sedation.

Anything that inhibits or induces CYP3A4 shifts the balance between Chlordiazepoxide and Nordiazepam.