Table 2.

 Patterns of prescribing and co-prescribing of study drugs at any time during observation period

Prescribed drug combinations	No (%) using drug
No co-prescribing:
Benzodiazepines only	16 242 (46.8)
Z drugs only	4736 (13.5)
Other drugs only	2872 (8.3)
Co-prescribing from two classes:
Benzodiazepines and Z drugs	6305 (18.2)
Benzodiazepines and other drugs	2169 (6.3)
Z drugs and other drugs	683 (2.0)
Co-prescribing of all drugs from all three classes:
Benzodiazepines, Z drugs, and other drugs	1720 (5.0)
Total	34 727 (100)