motion sickness
"So it worked... I normally suffer from motion sickness in cars, if I'm not driving. I decided to put the patch on before a 14 hour long international flight... I didn't suffer from any motion sickness but it made me illiterate!  I could see fine except for letters and numbers (or basic shapes). So I get to the airport at my destination in Uganda and going through customs I needed to fill out a basic form about the reason for my visit etc... only I couldn't read it to save my life! I'd use it again in an emergency but be aware of the potential side effects."