I woke up with a horrible forehead pain (an enormous headache)...felt very nauseous, numbing effects in different parts of my body, blurry visions, weak muscles. I was certain it was because of my sinus...it was pretty bad that I had to go back to bed. when I woke again...the pain was still there but I felt a bit stronger...but much less painful. The third day...the pain lessen...however, I sill am not strong enough to do my normal routine.