My eldset son tends to suffer from travel sickness, so before I take him on a long journey I always buy Kwells tablets, they are available from most chemists and cost around £2.09.
The tablets come in a blue cardboard packaging with 12 tablets inside which are wrapped up in the usual silver packaging, the tablets should be taken half an hour before traveling and then six hours later, the tablets should melt in the mouth, they are also suitable for chilren with asthma, I know this as my son has asthma.
All the usual info can be found on the back of the packaging,
My son didn't suffer from any side effects and they really worked well, I buy these everytime we go on holiday, I would highly recommend these tablets for anyone who has a child who suffers from travel sickness.
Thanks for reading