You have got a lot of advice on this thread ranging from excellent to dangerous. How do you know which is which? You don't, of course, that is why getting medical
advice from the internet
is rarely a good idea. My suggestion would be to check out a few of the many books
available on the subject. They will have at least been written by doctors or other medical
professional with some knowledge of what medical issues cruisers are likely to encounter. Then, get together with your own doctor and get some prescriptions for the medications that you may need and set up a system whereby you can contact the doctor by email
while you are sailing so you don't take the wrong medication or take an antibiotic needlessly.
You don't need to go overboard
on the medical kit. I was a paramedic for 11 years and have been a doctor for 16, but my kit is pretty basic. A few antibiotics for common infections, vinegar for ear infections, an antihistamine and an antibiotic ointment. Blue masking tape makes great bandages, toilet paper makes a good substitute for gauze, crazy glue for small lacerations, duct tape for just about anything. Naproxen and acetaminophen for pain. We have a handful of ancient hydrocodone/APAP tablets for the serious stuff.