There are a number of drugs that provide effective relief from motion sickness. These should always be taken before travel commences. All of the drugs used can cause drowsiness so driving should be avoided. For shorter journeys oral hyoscine is usually effective. This acts within about 30 minutes and provides protection for about 4 hours.
Side effects can be troublesome.
These include sedation, dry mouth and blurring of the vision. For longer journeys oral cinnarizine may be useful. This should be taken at least 4 hours before travelling and will provide protection for about 8 hours. Other drugs are available. Your travel health advisor will be able to help you decide which is the most suitable for you.