How common is it for senior levels employees to be drug tested in a risk consulting position?

So I have been searching for jobs for the past couple of weeks mainly in the area of start ups and was not really expecting to get drug tested. I was a little surprised when a recruiter called me up about a mid-level position with a smaller regulatory risk consulting company that works with a number of larger banks. It looks like they may be close to offering me a job. What is the likelihood I will be for this job? Anyone have experience with pre-employment screening for regulatory risk consulting companies?

PS not looking to be judged for lifestyle choices, I am just searching for insight on to the likelihood it will happen.