Sea motion sickness medicine: what to know

Motion sickness medicine works on signals involved in balance and vomiting. Depending on the product, it may be taken by mouth or supplied in another form. It can lessen [Nausea](/symptoms/nausea/) and [Vomiting](/symptoms/vomiting/), but it does not remove the boat's movement or guarantee that symptoms will not occur.

Drowsiness, dry mouth, blurred vision, or reduced alertness can occur with some options. Alcohol and other sedating medicines may increase these effects. A pharmacist can check the product against your age, pregnancy or breastfeeding status, medical conditions, and regular medicines.

Plan ahead because some products work best when taken before travel; follow the label or personalised advice rather than taking extra doses after symptoms begin. Test a product only when you do not need to drive, operate equipment, or make safety-critical decisions.

Combine medicine with practical measures: look toward the horizon, keep your head still, choose a stable part of the boat, take fresh air, and avoid reading. A [Travel Health Consultation](/treatments/occupational-and-travel-medicine/travel-health-consultation/) can help if you travel often or have complex health needs.

Get urgent help for severe sleepiness, confusion, trouble breathing, fainting, an allergic reaction, or inability to stay awake safely after taking a medicine. Seek medical advice if vomiting continues, you cannot keep fluids down, or you remain dizzy after leaving the boat.

Ask which medicine suits your trip, when to take it, whether it interacts with your regular medicines, how long drowsiness may last, and what to do if it does not control symptoms.