Getting sick whilst on holiday is no fun! So help yourself avoid illness whilst away by taking preventative treatments like anti-malaria tablets (if you are travelling to a country where exposure to mosquitoes is likely), or keep treatments with you to help take care of your digestion including Imodium and Pepto-Bismol.
Keep travel sickness at bay with, Sea Legs, Avomine and Kwells. And if you do end up suffering from diarrhoea and sickness, re-hydration sachets like Dioralyte are a great idea to replace any lost fluids to help you & your family recover sooner so that you can enjoy your holiday.