I have always considered 'First Aid' to be keeping someone alive until 'Secondary Aid' arrives or, rarely, assisting their evacuation to 'Secondary Aid" with immobilisation and so on.

Giving pain killers and using plasters is just dealing with minor niggles which do not need 'Secondary Aid'. Really just dealing with the day to day events of life, scratches and bruises.

What is the official definition of 'First Aid"?