Prospective live-aboard divers often worry about seasickness. It is a legitimate concern for some people, it devastates a vacation.For people who are normally comfortable on day boats, life on a live-aboard is not likely to be any worse. If you're somewhat prone to seasickness, there are ways to avoid it. Dramamine and TripTone are the most common over-the-counter drugs and both work fairly well.Better yet are waterproof Transderm Patches. Although a doctor's prescription is required, this remains one of the best motion-sickness medications available. (A word of caution: perform a reaction test for a few days ahead of time. This medication has been known to produce adverse reactions in rare cases.)For those who don't like taking any drugs, Peter Hughes recommends chewing on raw ginger or taking all natural ginger tablets. Another alternative is sea-motion wristbands, which apply low pressure to a point on the wrist. In addition, cabin location can sometimes be helpful. Cabins near the boat's middle and lowest center of gravity reduce the amount of motion.A few other medications that are wise to pack before embarking on a live-aboard journey: Benadryl for stings and bites and antibiotic cream or ointment for cuts, scrapes and rashes. In addition, decongestants such as Afrin nasal spray or Sudafed can be a lifesaver when the frequent dives and trips in and out of air-conditioned cabins take their toll on the sinuses.