Answers: the answer above me makes sense too but when I own taken antibiotics in olden times they made me nauseous. On the bottle it say to take w/ a modest lunchtime. Make sure that your dog has have a little to drink before you tender him his medicine b/c antiobiotics can be not easy on the stomach.
If your dog has an infection of the ears it is more promising that he is feeling dizzy or nauseaus due to the pressure. Vertigo, a sence of one dizzy or off match is pretty common next to ear infections.