Hippo, thank you... I took 1 10-day course of Cirpo, rested 1 day, then took a 7-day course of Cipro again, then rested 1 week, now I am on a 7-day Erythromicin course (day 5). It was very very strange, got lightheaded a few times, every 10-15 minutes, I would feel like my BP was dropping and my legs were giving out. Then I would feel great again and then bad again... besides the bad bad tummy issues. I have to thank you for the ginger chews BTW. I remembered to take them with me and it was a nice hand.