Translation of revocar

At noon the oldest soon came home. He was a doctor and gave me some salt and other Cuban medicine. I was reluctant to swallow that stuff but the pain and the doctor's smile persuaded me in the end.
The ride took us through mountainous areas, covered with dark green forest, with so many curves that I got sick. I wanted to vomit but I held myself back, as there were so many other next to me.
It was a good way of starting the trip. A ferry ride across the beautiful water, a beer in one hand and the unknown adventure lying ahead. I had to look for a place to sleep and checked a few hostels.