-Unable to sleep
-Awful taste ALL THE TIME
-Nausea
-Dizziness
-Sensitivity to light, and sound
I have an upper respiratory infection, I'm unsure if the Nausea, and Dizziness have something to do with that, but I've taken this stuff before, not the 500Mg, and have never had the nausea, and restless night. My eyes are extremely sensitive, as well, after only 2 1/2 days