Many do. It's a common requirement for companies who need to buy business insurance.
Yes.
None in Canada
The employer.
No, Cialis will not show up on any pre-employment drug screen.
No, pre employment drug screens do not screen for lisinopril, but you should be able to put what ever meds you are currrently taking on the pre screen questionaire.
Yes
Yes. Pre-employment screen...not sure of method
It depends on YOUR definition of "a few." Depending on how "few" of how many you took it could conceivably show up.
i dk
Just tell your new employer that you take a prescription pain killer and that it may show on the drug screen.
Private employers, and almost every government agency, can require it or are permitted by law to make it part of their pre-employment screening.
There would be little if any rationale for a pre-employment type drug screen to test for ondansetron. It is unlikely to be screened for.