They are not expensive any more. And yes, employers DO screen for other medications, got a wake up call for ya! :yup:
Here, just the first search I did turned this up:
Most employers find that a drug-testing program will eliminate people with problem, and not good applicants.* Drug tests for small to medium employers generally cost in the $50-$70.00 range, including collection of the sample, laboratory analysis, services of a Medial Review Officer (MRO), and communications of the results in the manner most convenient to the employer. ***Compared to the cost of even one employee with a substance abuse problem, most firms find eliminating the problem in the first place is well worth the time and money involved in a drug-testing program.
employmentdrugtesting.com/screening.html