results found...

PLEASE NOTE: This treatment is not available through our online pharmacy service. This page is for information only.


All inclusive service
No hidden fees
Next day delivery
Discreetly packaged
Discreet delivery
Prescriber available
Prescriber assess you online
How to order
  1. Click on the green "Back To Get Started" button, then click "Start Consultation" button on the next page.
  2. Fill in our short consultation form.
  3. Choose delivery method and mode of payment.
  4. Our team of expert prescribers will assess whether medication is suitable.
  5. If you get the green light and it is deemed suitable, your order will be processed quickly and efficiently.
Confidential Service

Your privacy is important, Prescription Doctor are committed to keeping your details completely confidential.

This is why we also take steps to conceal your prescription products under two layers of packaging.

Delivery and Packing
Discreet Delivery?

We have a commitment to delivering a discreet service and understand your need for privacy. We ship all orders via a trackable courier using discreet, plain packaging.

Do I Need to Wait in All Day for Delivery?

Once your order is dispatched you will receive a tracking number via sms and email.

Do You Deliver on Weekends?

We deliver medications between Monday and Saturday. You can upgrade to Saturday delivery on Friday.

My Order Hasn’t Arrived What Should I Do?

You should receive a tracking number with your order which you can use this number to track your parcel online. This should give you a clear indication of where your parcel is. If you haven’t received your parcel in the time frame given by our couriers, contact your local depot to find out where it is. You can also contact our support team who will do this for you.

Can I Be Notified by Text?

On checkout you will be asked to leave your mobile number so our courier can text you about the delivery. This is also useful if the courier has problems finding your address. We will not use your mobile number for anything else.

Payment Methods
How Can I Pay for My Order?

You can pay for your order using credit, debit card or via bank transfer.

I Don’t Have a Credit Card, How Can I Pay?

If you don’t have a credit or debit card you can pay via bank transfer. We will give you a unique reference number at checkout along with details of how to make the transfer. Once the money has cleared in our account, we will process your order.

How Do You Keep My Details Safe?

We are a completely secure site and take many measures to ensure your details are kept safe. We understand that you have a right to extreme privacy when purchasing sensitive health medications. All information that you provide to us is stored on our secure servers. Any payment transactions will be encrypted using SSL technology.

Payment and refunds?

You can pay for your order using credit, debit card and bank transfer.

Card Payment: Please notify us that you wish to cancel your order. Your refund will show available In 1 - 3 days.

Bank Transfer: A member of our team will contact you requesting for your bank details. These details are only used to transfer the funds back into your account.

Treatment Information

Table of contents

What is Phenergan?

Phenergan is an antihistamine which is used to treat travel sickness. It contains the active ingredient promethazine - the same ingredient found in other travel sickness tablets such as Avomine.

You can buy Phenergan online from us without the need of a prescription. Simply fill out our short medical form for our medical team to review. If the treatment is suitable for you, our UK based pharmacy will dispense and dispatch the item directly to your door via a fast and discreet delivery service.

How does Phenergan work?

Travel sickness is a condition which occurs when messages sent from the inner ear and the eyes contradict one another.

Inside your inner ear are 3 semicircular tubes which sense motion. These tubes are part of the vestibular system - the part of the system responsible for balance and a sense of orientation. A fluid moves in these canals, which in turn moves hairs connected to nerves. They report any movement the body feels.

When the brain receives the message from the vestibular system saying that motion has occurred, it combines the message with signals sent from the visual system via the optic nerves.

If the vestibular system detects motion but the eyes do not perceive motion, the brain interprets this that the body is under threat by a poison or other unknown substance. In response, it fires histamines to rid the body.

These histamines trigger the vomit centre of the brain. As the name suggests, this is the part of the brain which sends messages along nerves to the stomach in order to cause the body to vomit, thus expelling any harmful substance which it thinks have been ingested.

The antihistamine known as promethazine, which is the active ingredient of Phenergan, blocks the action of histamine in the body. The vomit centre of the brain is not informed of the mixed signals and so nausea and vomiting does not occur.

How do I take Phenergan?

The usual dose of Phenergan for travel sickness is 20mg or 25mg taken the night before the journey.

Take two 10mg Phenergan tablets or one 25mg Phenergan tablet the night before you plan to travel.

The tablets should be swallowed whole with a glass of water.

Do not crush or chew the tablet.

If you have trouble swallowing tablets, you can buy Phenergan Elixir - this is liquid or syrup which is taken orally.

Side effects and cautions

Before taking Phenergan, it's important to read the patient information leaflet supplied with your treatment. This leaflet contains important information on how to take Phenergan, as well as storage instructions and a complete list of side effects.

You can also view the leaflet for Phenergan online here.

Side effects of Phenergan

All medicines carry the risk of side effects, though not everybody gets them. While taking Phenergan, it's important to remain vigilant of any side effects which may occur.

Side effects may include:

  • Arrythmia
  • Blood disorder
  • Confusion
  • Dizziness
  • Drowsiness
  • Dry mouth
  • Headache
  • Hypotension
  • Jaundice
  • Palpitations
  • Photosensitivity reaction
  • Urinary retention
  • Vision blurred

This is not an exhaustive list of side effects. Further information regarding the safety of Phenergan, including a complete list of reported side effects, can be found within the leaflet enclosed with your medicine.

If you experience any side effects, regardless of whether they are listed above or in the patient leaflet, report them to your doctor.

Allergic reaction

Do not take Phenergan if you are allergic to promethazine or any of the other ingredients listed in the leaflet.

Phenergan contains Lactose. Speak to your doctor or a pharmacist before taking Phenergan if you have been told that you are sensitive to some sugars.

If you experience the signs of an allergic reaction, stop taking Phenergan and seek immediate medical attention by going straight to your nearest casualty department. Remember to take the packaging and any remaining medicine with you so that doctors know exactly what and how much you took.

Signs of an allergic reaction include:

  • Chest tightening
  • Dry, red and cracked skin
  • Itchy, red watery eyes
  • Raised, itchy, red rash (hives)
  • Swelling of the lips, tongue, eyes or face
  • Tummy pain, nausea, vomiting or diarrhoea
  • Wheezing

Is Phenergan safe to take while pregnant or breastfeeding?

If you are pregnant, think you might be pregnant or plan on becoming pregnant in the near future, speak to your doctor before taking Phenergan.

Phenergan should not be taken two weeks before giving birth.

Do not take Phenergan if you are breastfeeding. Phenergan is expressed in breast milk and can harm your baby. You should always speak to your doctor before taking any medicine if you are breastfeeding or plan on breastfeeding.

Other safety information

Always speak to your doctor before you buy Phenergan online from Prescription Doctor.

Please inform our medical team of all medicines you are currently taking, including those bought over the counter, prescribed by your doctor, as well as any health or herbal supplements you may be taking.

Do not take Phenergan past the expiry date printed on the packaging. The date refers to the last day of the indicated month. For example, "EXP: 12/25" means the 31st of December 2025.

Never throw away medicine via household or water waste as this can damage the environment. Take any unwanted or expired medicine to your local pharmacy and ask them to dispose of it safely on your behalf.

Always store medicine out of sight and reach from children and pets.

Never share your medicine with anybody else, even if they are experiencing the same symptoms or have been diagnosed with the same condition as you.

Frequently asked questions

What should I do if I forget to take Phenergan when I should?

If you forget to take Phenergan when you should, take it as soon as you remember and continue to take Phenergan as you should. Do not take more Phenergan to make up for the missed dose.

What should I do if I take more Phenergan than I should?

If you accidentally take more Phenergan than you should, go straight to your nearest emergency department. Remember to take the packaging and any remaining tablets with you, so that doctors know exactly what and how much you have taken.

Always take Phenergan as instructed in the leaflet. If you require further assistance, speak to your doctor or a pharmacist.

Will Phenergan affect my ability to drive or operate machinery?

Phenergan may cause drowsiness or sleepiness after taking it, or the morning after taking it. If you experience these effects, do not drive or operate machinery until you feel it is safe for you to do so.

Is it safe to drink alcohol while taking Phenergan?

Do not drink alcohol while taking Phenergan.

Will Phenergan interfere with my contraception?

Phenergan will not affect hormonal contraception, such as the combined contraceptive pill, mini pill or emergency contraceptive pill (morning after pill).

How long does Phenergan take to work?

Phenergan gets to work 20 minutes after taking it. The effects of Phenergan last for around 4 to 6 hours.

Where can I buy Phenergan?

You can buy Phenergan over the counter from pharmacies and some supermarkets.

At Prescription Doctor, we understand that going to your pharmacy can be a hassle for some people. If you don't have time to visit a pharmacy, you can buy Phenergan online from us.

All items ordered through our website are dispensed from a UK GPhC registered pharmacy and dispatched via a next-day discreet delivery, ensuring your treatment arrives quickly and securely.

Treatment information

  • Product Name: Phenergan
  • Manufacturer: Sanofi
  • Active Ingredient(s): Promethazine hydrochloride
  • Administration: Oral
  • Presentation: Film-coated tablets
  • Available Strength: 25mg
  • Exemption: Pharmacy
  • Dosage: 25mg to be taken the night before the journey. To be repeated after 6 to 8 hours as required.
  • Description: Phenergan is an antihistamine which is used as an antiemetic to treat travel sickness in adults.
  • Drug Class: Antihistamine
  • Alcohol Consumption: Do not drink alcohol while taking Phenergan
  • When Pregnant: Speak to your doctor before taking Phenergan if you are pregnant.
  • When Breastfeeding: Do not take Phenergan if you are breastfeeding.
  • Related Drug: Avomine
  • Price: 6.99 GBP
Click here to view the Phenergan - Patient Information Leaflet

Travel Sickness Alternatives



  • Blocks vomiting receptors
  • Helps reduce nausea
  • Sent from a registered pharmacy
View Treatment


  • Easy to take
  • Prevents motion sickness
  • Available without prescription
View Treatment


  • Prevents motion sickness
  • Eligible for next-day delivery
  • Can be swallowed, chewed or sucked
View Treatment


  • Provides relief for 72 hours
  • Easily applied as a patch
  • Dispatched from a UK registered pharmacy
View Treatment
Customer Service