Make a test page with that font styled. Make a PDF. Print from the PDF. If you get italics then you should be good. If you don't then you know you can't do it.
Well, in actuality, if it could not be italicized then it would not be show in the PDF. What you could do though is send the test PDF to your printer. Ask them to print it and if they get italics then you should be good.
Well, if the font is TrueType you will probably not see a specific Italic font for it. It's there, but you have to use the style options. That's the way it works on Windows TT fonts at least.