TABLE 4.

The various names and their usage frequencies of the opioid with the RxCUI number of 218337 in our retrieved dataset.

	Drug name	Frequency
1	methadone hcl	11,040
2	methadone hydrochloride	2,117
3	methadone hydrochloride	1,261
4	methadone ap hp	215
5	methadone/methadone hydrochloride	17
6	methadone ap?hp	12
7	methadone (chlorhydrate de)	11
8	methadone chlorhydrate ap hp	9
9	ketalgin (methadone)	8
10	methadone [methadone hydrochloride]	8
11	methadon alternova	6
12	methadon hcl	6
13	methadone chlorhydrate	4
14	methadone intensol	3
	Total	14,717