Motion Sickness Tablets UK: Cyclizine, Hyoscine, and Travel Sickness Treatment
Key fact: Motion sickness is common and is caused by a conflict between what the inner ear senses and what the eyes see. Several effective OTC medicines are available in the UK — but timing is critical: all work best when taken before symptoms begin.
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Before travel: when to take Kwells (hyoscine)
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OTC options available at UK pharmacies without prescription
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Before travel: when to take most motion sickness tablets
Travel sickness can turn what should be an enjoyable journey into an ordeal. The good news is that it is one of the most effectively treated conditions in pharmacy — multiple medicines with different mechanisms are available, giving most people at least one excellent option. This guide covers all the major motion sickness tablets available in the UK, explains how each one works, and helps you choose the right one for your situation.
For a complete clinical overview of nausea and vomiting — including all causes and treatment options — see our nausea and vomiting guide →.
What Is Motion Sickness and Why Does It Happen?
Motion sickness occurs when the brain receives conflicting sensory signals about movement. The inner ear (vestibular system) detects motion through fluid movement in the semicircular canals and the signals from otolith organs — but the eyes may be fixed on a stationary object (such as the interior of a car), sending a contradictory “not moving” message. The brain interprets this conflict as a sign of sensory disruption and triggers the vomiting reflex as a protective mechanism.
This is why looking out of the window at the moving landscape, or fixing your eyes on the horizon during a boat trip, reduces motion sickness: it removes the visual–vestibular conflict. All motion sickness medicines work by dampening one side of this conflict — either by reducing vestibular sensitivity (antihistamines, anticholinergics) or by blocking the vomiting reflex more directly.
Prevention, not cure: All motion sickness tablets are significantly more effective when taken before travel begins. Once nausea is established and gastric emptying has slowed, oral medicines absorb poorly. Take your chosen tablet 1–2 hours before departure for best results.
Motion Sickness Tablets Available in the UK
Four over-the-counter medicines are commonly used for travel sickness in the UK. All are Pharmacy (P) medicines, meaning a pharmacist must be present at the point of sale. A brief discussion with the pharmacist will confirm which is most appropriate for you.
| Medicine | Active Ingredient | Mechanism | Duration | Drowsiness |
|---|---|---|---|---|
| Cyclizine (Valoid) | Cyclizine hydrochloride 50mg | H1 antihistamine + anticholinergic | 4–6 hours | Moderate |
| Hyoscine (Kwells, Joy-Rides) | Hyoscine hydrobromide 300μg | Anticholinergic (muscarinic) | Up to 6 hours | Moderate |
| Cinnarizine (Stugeron) | Cinnarizine 15mg | H1 antihistamine + calcium channel blocker | Up to 8 hours | Moderate |
| Promethazine (Avomine) | Promethazine teoclate 25mg | H1 antihistamine (sedating) | Long-acting: one dose the night before often covers the next day | High |
Cyclizine for Travel Sickness: How It Works
Cyclizine 50mg is one of the most widely used travel sickness tablets in the UK. It works through a dual mechanism: blocking H1 histamine receptors and muscarinic acetylcholine receptors in the brain’s vomiting centre and vestibular nuclei. This combination reduces the brain’s sensitivity to vestibular–visual conflict signals, making it effective for car sickness, sea sickness, and air sickness.
For those who find their symptoms persist despite non-drug measures, cyclizine for motion sickness offers a well-established pharmacological option with a strong evidence base.
- Take 1–2 hours before travel begins for prevention
- Adults and children 12+: 50mg up to three times daily; maximum 150mg in 24 hours
- Children 6–11: 25mg up to three times daily (seek pharmacist advice)
- May cause drowsiness — do not drive after taking
- Available over the counter at UK pharmacies without prescription
- Also suitable for vertigo-associated nausea — see our full cyclizine guide
Hyoscine (Kwells): The Fast-Acting Option
Hyoscine hydrobromide (sold as Kwells and Joy-Rides) is an anticholinergic agent that works by blocking muscarinic receptors in the vestibular system and the vomiting centre. It is considered one of the most effective single agents for motion sickness and has a particularly fast onset. Kwells tablets (300μg) can be sucked or chewed for even faster absorption, making them a good choice if you are caught short and need rapid relief.
Side effects include dry mouth, blurred vision, drowsiness, and urinary hesitancy. Hyoscine should be avoided in people with glaucoma, prostatic hypertrophy, or myasthenia gravis. Kwells (300 micrograms) can be used from age 10. For children aged 4 to 10, Kwells Kids (150 micrograms) is licensed at a lower dose.
Quick-relief option: Hyoscine (Kwells) tablets can be sucked or swallowed. If you have already started feeling unwell, sucking the tablet allows faster buccal absorption compared to swallowing. Take 30 minutes before travel for prevention; repeat after 6 hours if needed.
Cinnarizine (Stugeron): For Longer Journeys
Cinnarizine (Stugeron 15mg) is an antihistamine with additional calcium channel blocking activity, which reduces vestibular system excitability. Its longer duration of action (up to 8 hours per dose) makes it particularly suitable for longer sea voyages, extended flights, or multi-day travel situations where redosing is inconvenient.
Cinnarizine should be taken 2 hours before travel begins and repeated every 8 hours as needed. It causes moderate drowsiness. It should be used with caution in Parkinson’s disease. Not recommended for children under 5. We don’t currently supply Stugeron.
Promethazine: When Sedation Is Acceptable
Promethazine teoclate (Avomine 25mg) is a first-generation antihistamine with sedating properties. It is long-acting: for a long journey, one tablet at bedtime the night before usually covers the next day, which makes it suitable for sea crossings, long-haul flights and overnight travel. It is not appropriate if you need to remain alert, and drowsiness can carry over into the next day.
For a short journey, take Avomine 1 to 2 hours before you set off. Avomine tablets can be given to children from 5 (half a tablet for ages 5 to 10). Promethazine must never be given to children under 2. If you’re pregnant, speak to your midwife or GP before taking any travel sickness medicine.
Comparing Motion Sickness Tablets: Which Is Right for You?
| Situation | Recommended Option | Why |
|---|---|---|
| Short car or bus journey (under 4 hours) | Cyclizine 50mg or Hyoscine (Kwells) | Fast onset; shorter duration; widely available |
| Sea voyage or long-haul flight | Avomine (promethazine) or cinnarizine (Stugeron) | Longer duration; fewer redoses needed |
| You need to stay awake and alert | Kwells (hyoscine) or cyclizine — try a dose before you need to drive | All four can cause drowsiness; avoid Avomine |
| Overnight or long-haul flight where sleep is fine | Avomine (promethazine) | Sedating and long-acting; take the night before |
| Symptoms already started | Hyoscine — suck the tablet for faster absorption | Buccal absorption bypasses gastric emptying issues |
| Pregnant | Speak to your midwife or GP first | We don’t supply travel sickness medicines online in pregnancy |
| Child aged 6–11 | Kwells Kids (ages 4 to 10), Kwells (10 and over) or Avomine (half a tablet, ages 5 to 10) | Licensed children’s doses; an adult orders and answers the questions |
Non-Tablet Remedies for Travel Sickness
For those who prefer non-pharmaceutical options, or wish to combine approaches, the following strategies have varying degrees of evidence.
- Fix your gaze on the horizon — the single most effective non-drug strategy; reduces visual–vestibular conflict directly
- Sit in the front of the car or the middle of a boat — positions where motion is felt least
- Avoid reading, screens, and looking downward during motion
- Fresh air — open a window or direct a fan towards your face
- Ginger — modest but real antiemetic effect; ginger biscuits or ginger capsules before travel
- P6 acupressure wristbands (Sea-Bands) — safe; limited evidence but widely used; worth trying alongside medication
- Avoid heavy meals before travel — an empty stomach is better tolerated than a full one during motion
Get Travel Sickness Tablets Online
Access Doctor supplies Kwells, Kwells Kids and Avomine after a short online questionnaire checked by our pharmacy team. For a child, an adult places the order and answers the questions. If approved before 3pm, Monday to Friday, your order is dispatched the same day.
View travel sickness treatments →Motion Sickness in Children
Motion sickness is more common in children aged 2–12 than in adults, with peak susceptibility between ages 4 and 10. The same basic mechanisms apply. Non-drug strategies — looking at the horizon, sitting in the front seat (for children of appropriate age and size), and avoiding screens — should be tried first.
Children under 2: Do not give any motion sickness medicine without medical advice. Children aged 2–5: Consult your pharmacist before using any OTC antiemetic. Children 4 and over: Kwells Kids (hyoscine 150 micrograms) is licensed from age 4, Avomine (half a tablet) from age 5, and Kwells from age 10.
When to Seek Medical Help
Call 999 immediately if nausea and dizziness are sudden in onset with no prior history of motion sickness, especially if accompanied by sudden severe headache, facial weakness, arm weakness, or slurred speech. New-onset severe vertigo in an adult requires prompt medical assessment to rule out a neurological cause.
See a GP or pharmacist if:
- OTC motion sickness tablets are not adequately controlling your symptoms
- You experience motion sickness in situations that did not previously affect you
- Dizziness or vertigo persists after travel has ended
- You are pregnant and need safe antiemetic advice for travel
- You have a medical condition (heart disease, glaucoma, prostate problems) that restricts which antiemetics you can take
Frequently Asked Questions about Motion Sickness Tablets
What is the best tablet for motion sickness in the UK?
There is no single “best” tablet — the right choice depends on journey length, whether you need to stay awake, your age, and any other medical conditions. Cyclizine (Valoid) is the most widely used for general travel sickness and is suitable for most adults. Hyoscine (Kwells) acts faster and suits short journeys; Kwells Kids is available for children from 4. Avomine and cinnarizine (Stugeron) suit longer voyages. All four are pharmacy medicines in the UK.
Can I buy motion sickness tablets without a prescription?
Yes. Cyclizine, hyoscine, cinnarizine, and promethazine are all available over the counter at UK pharmacies as Pharmacy (P) medicines. A pharmacist will ask a few brief questions to confirm suitability. No prescription is needed.
When should I take motion sickness tablets?
All OTC motion sickness tablets work best when taken before symptoms begin. Take cyclizine or cinnarizine 1–2 hours before travel. Take hyoscine 30 minutes before travel. Promethazine (Avomine) can be taken the evening before a long journey. Do not wait until you already feel sick — by that point, gastric emptying has slowed and oral medicines absorb poorly.
Are motion sickness tablets safe in pregnancy?
Antihistamines such as cyclizine and promethazine are first-line medicines for pregnancy sickness in the RCOG guideline, but the product leaflets advise caution in pregnancy. Speak to your midwife or GP before taking any travel sickness medicine while pregnant. We don’t supply travel sickness medicines online in pregnancy.
Why does cyclizine make you drowsy?
Cyclizine is a first-generation antihistamine that crosses the blood–brain barrier. Once in the brain, it blocks H1 receptors in both the vomiting centre (producing the antiemetic effect) and in the arousal centres of the brain (producing drowsiness). This is a class effect of all first-generation antihistamines. Do not drive after taking cyclizine until you know how it affects you.
What can I take for motion sickness if I cannot take antihistamines?
If antihistamines are contraindicated (for example, due to certain medical conditions), hyoscine (Kwells) is an anticholinergic option that works through a different mechanism. Non-drug strategies — fixing your gaze on the horizon, sitting in the front of the vehicle, fresh air, ginger, and P6 acupressure wristbands — can also provide meaningful relief. Speak to a pharmacist for personalised advice.
What is the Kwells dose, and how do I take it?
Take Kwells up to 30 minutes before you travel, or when you start to feel sick. Adults take 1 tablet every 6 hours if needed, and no more than 3 in 24 hours. Children aged 10 and over take half to one tablet every 6 hours, up to 3 in 24 hours. For children aged 4 to 10, use Kwells Kids: half to one tablet every 6 hours, up to 3 in 24 hours. The tablets can be sucked, chewed or swallowed.
Can Kwells help with vertigo or nausea that isn’t travel sickness?
Kwells are licensed only to prevent travel sickness. Vertigo and nausea from other causes need a different approach: see your GP if vertigo is new or keeps coming back, and ask a pharmacist about medicines such as cyclizine or prochlorperazine, which are used for vertigo.
Have Kwells been discontinued?
No. Kwells and Kwells Kids are still made and sold in the UK. There have been temporary supply shortages, so some pharmacies have run out at times. We currently supply both.
What are Avomine tablets used for?
Avomine (promethazine teoclate 25mg) is used to prevent and treat travel sickness. It’s long-acting, so one tablet at bedtime the night before a long journey usually covers the next day. It can also be used for nausea and vertigo from other causes. Avomine tablets can be given to children from 5, and they often cause drowsiness.
References
- British National Formulary (BNF). Antiemetics — motion sickness. bnf.nice.org.uk
- Electronic Medicines Compendium (EMC). Cyclizine 50mg tablets — Summary of Product Characteristics. medicines.org.uk/emc
- Electronic Medicines Compendium (EMC). Kwells 300 microgram tablets — Summary of Product Characteristics. medicines.org.uk/emc
- RCOG. The Management of Nausea and Vomiting of Pregnancy and Hyperemesis Gravidarum. Green-top Guideline No.69. 2024.
- NHS. Motion sickness. nhs.uk/conditions/motion-sickness/
- GPhC. Standards for registered pharmacies. pharmacyregulation.org
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new treatment. Suitability of medicines depends on your individual health history. In a medical emergency, call 999.