Promethazine (Sominex)

56 tablets


Order now and get it by Friday 29th March



Side Effects

Q & A

Travel sickness or motion sickness is a kind of spinning sensation. Our eyes, ears, and other parts of the body send movement related messages to the brain. These messages help our body to keep a sense of balance. However, if it happens that one of them transmits an incorrect message, the brain gets confused. This causes dizziness, making you feel sick. While travelling, these messages are unusual.

Promethazine is an antihistamine. It helps reduce travel sickness. Promethazine is also known as Avomine, Phenergan, and Sominex. It contains the ingredient promethazine hydrochloride. Promethazine works on the symptoms of sickness associated with motion. It works directly on the brain. This helps you feel relaxed and a little drowsy. 

Download Promethazine patient information leaflet

  • Always read the patient leaflet for more detailed information
  • Adults and children over 10 years of age – 1 tablet (25mg) at night, before the journey, or as prescribed by the doctor
  • Repeat after 6-8 hours, if required
  • Take the medicine before or after meal
  • Do not take this medicine for more than 7 days

  • Drowsiness
  • Headache
  • Dry mouth
  • Blurred vision
  • Loss of appetite
  • Dizziness

Serious Side Effects – if you observe any of the following side effects, see a doctor.

  • Allergic reaction
  • Rashes
  • Swelling of the face, lips
  • Liver problems
  • Muscle stiffness
  • Irregular heartbeat
  • Anemia
  • Serious loss of appetite
  • Severe dizziness
  • Photosensitivity

These details are provided only as a guide. Please read patient information leaflet for more details.

If you are looking for some expert help, book an ONLINE consultation with our GMC Registered Clinicians at

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I often become carsick, does this mean I’ll also become seasick?

Every vehicle and means of travel (etc.) will have a unique pattern of movement and vibrations. A person will most likely be susceptible to a certain motion, instead of being susceptible to all kinds of motions. What affects one person may have absolutely no effect on another person; the only way to find out what affects you is by trying it out.

How does ginger help motion sickness?

Ginger root has been long used in Chinese medicine and regarded as an effective treatment for a range of conditions, including nausea and stomach ache. It can be consumed in the form of powder, capsules, or drank in tea. A lot of other people have also boasted of the positive effects of ginger, but scientific evidence is conflicting. Ginger is regarded as safe to try, but can’t be currently regarded as an effective treatment.

Is there a cure for motion sickness?

No. There is no existing cure currently available for motion sickness. However, there are many options towards preventing symptoms or reducing the severity of pre-existing symptoms. For a large majority of affected people, this condition will be totally self-treatable through non-pharmacological methods.

Can a person overcome a struggle with motion sickness completely naturally?

Yes. It is quite common for motion sickness to naturally fade after a long while of suffering from it. Medical treatment does not always need to be turned to. 

To complete your purchase, take our questionnaire. Once completed, a registered doctor will review your answers and issue a prescription, if suitable. This prescription will be sent to our practising pharmacy who will dispense your treatment. Orders are shipped by secure next-day courier.

Patient discretion and confidentiality top the priority list at!