Phenergan

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.

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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.

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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.

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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.

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.

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.

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.

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Frequently asked questions

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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.

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