It is my 10th and final day of Levaquin 500mg qd. I began taking it for sinusitis that became pharyngitis/laryngitis. Since beginning the drug, I have experienced decreased mental acuity, lightheadedness, food and drinks taste salty, extremely bizarre & lucid dreams -- sometimes 5-6 per night that I can remember or at least can remember how strange they were. Also, I have experienced everything from diarrhea to complete cessation of BM, bloating, and extreme nausea.