Like Travellinglady mentioned checking in the the pharmacist would be a wise thing to do. Just because something is herbal/natural doesn't mean there wont be a reaction or behavioural change. I found that out the hard way with St John's Wort. It doesn't play nicely with other meds for me.

We tend to forget to most of our medicines have already been synthesized from the natural world and made into the common medicines we have today.