Quick question! Ketoconazole AND a Pyrithione Zinc? Any interaction?

[wherenoeaglesfly]

I just picked up an rx of Ketoconazole shampoo 2%, but since I thought it was going to be a cream that could only be applied to the face, before I went to the store and got this http://www.amazon.com/THERAPY-AntiDandruff-Shampoo-Conditioner-Hydration/dp/B007JT7AIA, with the active ingredient being Pyrithione Zinc 1%.

Could it hurt to use these together?