Yep from what I've read it seems to be ok to take it anytime. Don't think there's been alot of testing done, but Ive read its ok. I would take it myself if that helps. Just to the reccommended dosage. I just had a look at my bottle and two varieties just say adults, take this much, and kids this much.
Its awesome stuff. I have only had a cold in the last two years once when I ran out of it.
I find Naturamedics (I think thats right - the green label anyway) to be the most effective and nicest tasting.
Bookmarks