Metronidazole
"This is my third day of Ciprofloxacin 500mg twice per day and Metronidazole 500mg twice per day for recently diagnosed diverticulitis.  I am experiencing disturbances in sleep, despite being really tired I am finding it difficult to fall asleep.  I also feel light headed.  I am drinking lots of water.  I have been following a gluten free diet prior to diagnosis and this appears to have eased my worst symptoms."