Sharps that retract after use, or are very small, should be disposed of like all other sharps.
If you would like to bring your sealed container to a community sharps disposal program, there are drop-off locations in Barren County, Boyle County, Calloway County, Edmonson County, Grayson County, Hart County, Logan County, McCracken County, Mercer County, Warren County and the City of Louisville.