First day, after I took 750 mg Levaquin I had cookies and cup of tea for lunch (loss of apetite probably). Next morning I felt lack of energy. Within an hour after taking the second dose I felt depressed and hopeless for a short time. If the symptoms remain where they are I will continue and finish the other 3 doses because have been suffering from sinus infection for almost a month. Thanks to all the contributors for their input. I can see how dangerous this medicine can be for some patients.