Motion sickness over-the-counter medicine: what to know

Motion sickness happens when the brain receives conflicting signals from the eyes, inner ear and body. Medicines used for it can calm signals involved in nausea, but they may also cause drowsiness, dry mouth or blurred vision. Read the product label carefully because ingredients, age limits and dosing instructions vary. Do not combine products with alcohol, sedating medicines or another motion sickness remedy unless a pharmacist or clinician says it is suitable.

Children, older adults, pregnant people, and people with glaucoma, urinary retention, breathing problems or other medical conditions may need a tailored choice. A pharmacist can check whether a product fits your health history and other medicines.

If a pharmacist recommends a medicine, follow the label and take it at the advised time before the journey; taking it only after severe symptoms begin may be less helpful. Sit where movement is gentler, look at the horizon, keep fresh air moving, and avoid reading or using a screen. Take small sips of water and choose light food rather than a heavy meal before travel.

Do not drive, cycle or operate machinery until you know whether the medicine makes you sleepy or slows your reactions. Keep the medicine in its original packaging and never give an adult product to a child without checking the label or professional advice.

Seek urgent medical help for fainting, confusion, severe headache, chest pain, trouble breathing, weakness on one side, blood in vomit or inability to keep fluids down. Arrange medical advice if vomiting continues after travel, symptoms occur when you are not moving, or episodes are becoming frequent. Ongoing vomiting can lead to dehydration, with signs such as very dark urine, marked thirst or unusual weakness.

Ask which ingredient suits your age, health conditions and regular medicines; how far in advance to take it; and what side effects should make you stop. Also ask whether a travel health consultation is useful for a trip involving long journeys or repeated symptoms.