Be polite and professional, not angry or annoyed. Give your name, the job you interviewed for (by requisition number, if you have it, or by job title), the date and time of your interview, and the name(s) of the person (people) who interviewed you. Then, assuming they don't tell you that the job has been filled, ask:
There are a number of different dextromethorphan side effects depending on any other chemicals the DXM might be mixed with. You may notice the following effects associated with DXM use: 1  Dizziness. 2  Feeling faint.  Nausea.
Common side effects of hydroxyzine may include shakiness, dry mouth, and dizziness. This eMedTV Web resource describes other possible side effects, including a list of potentially serious problems that may require prompt medical attention.