Depends where you are going. Afghanistan you would be woeful under prepared, UK you would be wasting time on things you don't need.

Point 6. That is essential.

Aside from the antibiotics. Unless you are going somewhere where you will not be able to get to a doctor for an extended period of time I would not take prescription medicines as these are by their nature only things a doctor can prescribe.

We are in sever danger in the near future of many bacteria becoming resistant to antibiotics and when that happens it will be a major catastrophe. In the US I know that you use antibiotics as grow promoters for chickens which is utter utter madness.