Haven't been to Fiji. When I travel, some things I didn't notice on the list above:
1.) Lycra socks or similar to prevent chafed sores on your feet.
2.) Bandaids in case you get them anyway.
3.) Pseudofed 24-hour (so it doesn't wear off while I'm down) to aid equalization (a controversial practice, plus it's illegal in some places like Mexico), Flonase and Claritin.
4.) I also take Ibuprofen, Tylenol, Imodium (to shut down diarrhea), pill form of what amounts to generic Pepto Bismol, triple antibiotic ointment (for the abrasions, etc...), and I like to take at least one antibiotic prescription in case I get bronchitis or similar.
5.) Swimmers ear drops, and use about ever 3 dives or so as a preventative (wait till you're treating infection and it burns!).
6.) Please make that sunscreen a reef-safe product.
7.) Any chance you'll room with a snorer? Ear plugs might come in handy.
So basically I am to have on hand any medications I'm credibly likely to want. People who get occasional UTIs may want Azo.
Again, I have never been to Fiji. Many popular dive settings are in areas with limited (or no) access to much in terms of even over-the-counter medications.