Will I get seasick on a cruise? Here's what travelers should know.

Mackenzie Pollock had a feeling she’d get seasick on her first cruise.

The 29-year-old Oregon resident tends to get carsick, so when she felt nausea on a Caribbean sailing with Princess Cruises in February, it wasn’t a surprise. And she came prepared.

Pollock talked to her doctor before the trip, who prescribed Scopolamine patches. She also stocked up on Bonine tablets after seeing videos about it online. “I’m a librarian,” she said. “I do copious amounts of research on everything.”

There were “days here and there” during the 20-day trip when she felt sick, like when they went in and out of Florida and sailed through a thunderstorm. But between the two medications and other coping strategies like sitting on her suite’s balcony, she was able to manage it and enjoy her time with family.

Getting seasick can put a damper on a cruise, but there are ways to keep it from ruining your trip.

Why do people get seasick?

Seasickness is a form of motion sickness. That happens when there is a difference between the information you get from your visual system, your inner ear and receptors in your muscles, according to Dr. Kathleen Cullen, a professor of biomedical engineering at Johns Hopkins University. In a cruise ship cabin, for instance, the surroundings might appear stable even while the vessel is moving.

“And this mismatch between what your visual system is experiencing and what your balance organs are telling your brain about how you're moving is sort of an alert signal to your brain that something is wrong,” said Cullen. “So, it's a sensory conflict that actually is the big problem.”

Motion sickness symptoms can include nausea, dizziness and vomiting.

Some travelers are more vulnerable than others, according to the Centers for Disease Control and Prevention. Those include kids between 2 and 12, and people who have a history of migraines, vertigo and vestibular disorders. “Pregnancy, menstruation, and taking hormone replacement therapy or oral contraceptives have also been identified as potential risk factors,” the health agency said on its website.

On the other hand, people older than 50 are less likely to develop it, and toddlers and infants are usually immune.

What is the worst cruise for seasickness?

While modern cruise ships have stabilizers that reduce their roll, some itineraries are more prone to choppy waters.

“If you're doing a transatlantic over to England, the North Atlantic can be pretty gnarly, especially in the winter,” said Rusty Pickett, a travel adviser and owner of Shellback Cruises. The Drake Passage, a feature of many Antarctica expedition sailings, is also notoriously treacherous.

Travelers can seek out calmer seas, though. (Click here for USA TODAY’s guide to the best times to cruise by region.)

Where is the best cabin to avoid seasickness?

The bow of the ship tends to bounce up and down, said Pickett. “Lower in the ship, middle (and just aft of middle) minimizes the movement,” he added.

Booking a stateroom with a window so you can keep an eye on the horizon or getting fresh air – like Pollock did on her balcony – could also be helpful, Cullen said.

Short vs. long cruises: Which one is right for you? Here's how they compare.

How do I stop being seasick on a cruise?

Travelers can bring medications and other remedies with them. Prescription Scopolamine patches can help get passengers “over the hump,” Cullen said. There are also other over-the-counter medications like Dramamine.

Those can make users drowsy. Travelers should talk to their doctor about their options ahead of their cruise.

Ginger candies or ginger ale – made with real ginger – and acupressure wristbands may also be helpful.

After you board, Cullen recommends watching the horizon on the ship’s outer decks. “That's a pretty good way to keep yourself, initially, from getting motion sick if you're prone to it,” she said.

The CDC offers other suggestions, including lying down, closing your eyes and sleeping; limiting caffeinated and alcoholic drinks; eating small portions of food often; and not smoking.

What other options do passengers have?

Cruise ships generally have onboard medical staff that can treat a range of ailments, and Pickett said the vessels keep a supply of seasickness medication on hand.

During an Antarctica expedition I took with Aurora Expeditions in December, crew members also placed barf bags around the ship that passengers could grab if they felt sick while outside their rooms.

Pollock said feeling seasick didn’t put her off cruising, and she and her family plan to take another. “It was frustrating when it happened, but it didn't overshadow the trip at all.”

Nathan Diller is a consumer travel reporter for USA TODAY based in Nashville. You can reach him at [email protected].

This article originally appeared on USA TODAY: Do you get seasick? How to keep it from ruining your cruise.