I have been taking it for a couple weeks now due to my allergies to pets.
I woke up with a bad headache and now it is 2:00 am the next day. Still hve a bit of a headache. Feel a little nausea. Feel out of it.
I never have headaches lasting all day . I also experience dry mouth in the middle of the night so bad that I have to wake up and drink a glass of water.