This past Feb. I started with a earache, thought it would go away until three days before I went to the emergency room and was prescribed the Z-pac for five days. Felt better on the day leaving and the first full day off the z-pac. Until the day after, the ear started again! I was so in pain that I could not put my hearing aid in the ear (thankfully I had the other ear/hearing aid) so went to see friends who were working at the TreeHouse (we were staying at Cocolapalm) - they suggested I go to the Pharmacy by Burger King - so we did and the Pharmacist was able to prescribe another 5 day z-pack - I went the rest of the week with one hearing aid but the ear did feel better the day we were to leave so I was able to put the hearing aid back in. Next time I am prescribed a z-pac, I am going to go for the full 10 days! Lesson learned!