Is It Safe to Take These Tablets Together?

My parents will be going on holiday on a cruise for 7 days next week, visiting 3 countries.

My mum bought Sturgeron 15 Cinnarizine 15mb (per tablet) for travel sickness.

My mum takes:

  • Fultium-D3 800 Unit Capsules
  • Indapamide 1.5mg modified-release tablets
  • Lactulose 3.1-3.7g/5ml oral solution
  • Felodipine 2.5mg modified-release tablets
  • Amitriptyline 10mg tablets
  • Naproxen 500mg tablets

While my dad takes:

  • Tramadol 50mg capsules

Is it safe for my parents to take their medications and Cinnarizine together?

Thanks.