Phenergan

Phenergan Is Effective At Treating Allergies, Insomnia and Travel Sickness

Price Checker
£19.99
Buy Phenergan now 
Free shipping on all orders over £50

Receive it:
Order within:

Treat allergies, insomnia or travel sickness with this effective antihistamine.

Strength: 25mg

What is Phenergan?

Phenergan is a drowsy antihistamine medication that contains the active ingredient promethazine hydrochloride.

What is Phenergan used for?

Phenergan is used to treat a variety of different conditions, including:

  • Temporary sleeplessness in adults (insomnia)
  • Hay fever and other minor allergic reactions
  • Travel sickness, nausea and vomiting
  • Coughing and a runny nose

How does Phenergan work?

Histamine is a substance that the body releases when it detects something harmful, such as an infection. When histamines are released, your blood vessels expand and your skin swells, which helps to protect the body from infection.

For people with allergies, however, the body believes certain substances are harmful that aren’t to others, and releases histamine as a result. This causes the classic symptoms of allergic reactions, such as a skin redness, hives, itching and swelling.

Promethazine hydrochloride, the active ingredient in Phenergan, is an antihistamine. It blocks the effects of histamine, which reduces the symptoms of mild allergic reactions such as hay fever.

In addition to reducing the symptoms of hay fever, promethazine has a number of other effects. It makes you drowsy, which means it can be used to treat temporary difficulties sleeping. It also affects the area of the brain that controls vomiting, which means it can be used to treat feelings of sickness - especially while travelling.

How long does Phenergan take to work?

Phenergan acts quite quickly. You should begin to notice the effects of the treatment around 20 minutes after taking it.

How long does Phenergan last?

The effects of Phenergan can last between 12 and 24 hours.

How should I take Phenergan?

Adults should take one tablet daily, preferably at night.

You should only take Phenergan when you need it, for example when you’re struggling to sleep due to temporary anxiety or your hay fever symptoms.

Who can’t take Phenergan?

Most adults can take Phenergan on a temporary basis safely. However, it isn’t suitable for everyone. Tell your GP or a pharmacist before taking Phenergan if you:

  • Have had an allergic reaction to promethazine or any other medicine in the past
  • Have primary angle closure glaucoma
  • Have problems urinating or emptying your bladder
  • Have epilepsy or any other condition that causes seizures
  • Are intolerant of any sugars
  • Have an upcoming allergy test
  • Are unable to drink alcohol
  • Are trying to get pregnant

Does Phenergan cause any side effects?

Some people will experience mild side effects while taking Phenergan. They may include:

  • Daytime tiredness
  • Nightmares
  • Dizziness
  • Difficulty concentrating
  • Headaches

Phenergan sometimes makes your skin more sensitive to sunlight. Keep out of direct or strong sunlight and follow sun safety advice.

People aged 65 and above who take Phenergan may experience additional side effects. These include:

  • Confusion
  • Dry mouth
  • Blurred vision
  • Difficulty passing urine

In rare instances, Phenergan may cause more serious side effects. Stop taking Phenergan and seek immediate medical attention if you have:

  • Signs of liver problems, such as yellowing skin or whites of the eyes
  • Bruising or bleeding that’s worse than normal
  • Muscle stiffness, shaking, or unusual face or tongue movements
  • Signs of a serious allergic reaction, such as difficulty breathing, chest tightness, wheezing, a skin rash, or swelling of the mouth, face, lips, tongue or throat

How should I store Phenergan?

Phenergan should be stored in a dry, cool environment that does not exceed 25°C.

 Information Leaflet

Always read the patient information leaflet before commencing treatment.

Written and reviewed by our qualified team

GPhC Number: 2088658

Carolina Goncalves

Authored by:

Carolina Goncalves
Superintendent
Pharmacist

GPhC Number: 2225869

Rehma Gill

Reviewed by:

Rehma Gill
Pharmacy
Manager

Find out more about how we ensure the accuracy of our content with our content guidelines.

Content last updated: 25 Oct 2023

Phenergan Reviews

9.6/ 10
5
161
4
15
3
0
2
1
1
3
Truspilot logo
Google logo
Feefo logo

Based on 180 independent customer reviews taken by Feefo (see all Feefo Reviews), Google and Trustpilot (see all Trustpilot Reviews).


(read on Feefo)

Product Review:

"They do the job stop my nose from running"

Service Review:

"Excellent service quick to deliver and website easy to use"


(read on Feefo)
"Speedy delivery"

Product Review:

"Does what’s needed , works well"

Service Review:

"Arrived quickly"

"Great customer service and super fast…"

Product Review:

"Fab service super fast deluvery"

Service Review:

"Great customer service and super fast delivery highly recommend"


(read on Feefo)
"Great service Thank you Would buy again"

Product Review:

"Great experience no issues"

Service Review:

"5 star quick delivery"


(read on Feefo)
"came in two days as promised"

Product Review:

"They help me relax and do what they should"

Service Review:

"yes excellent service"


(read on Feefo)
"Great assured service"

Product Review:

"Needed these over the festive period. Delivered on time. All relevant details shared before checkout."

Service Review:

"Prompt delivery of orders. Good range of products
Highly recommend"

"Very good tabs help with sleep at night"

Product Review:

"Very good "

Service Review:

"Very good tabs help with sleep at night"


(read on Feefo)
"Excellent service."

Product Review:

"The service is exceptional from ordering to speed of delivery."

Service Review:

"Ordering is easy and delivery is exceptionally quick."


(read on Feefo)
"Excellent. Would reccomend to anyone"

Product Review:

"Top quality products. Fast., discrete service"

Service Review:

"Very fast and easy delivery.
Extremely good service. Excellent pharmacy and customer care"

"Great range of items and great prices"

Product Review:

"I use this as a sleeping tablet and it works better than anything Ive had from a Dr."

Service Review:

"Great range of items and great prices, have already recommended them to family."

Discreet service

With our discreet packaging you can order in confidence.

We never use our brand name on bills, delivery papers or your bank statement.

All our packages are completely plain, without any details of what’s inside or who has sent it.

Estimated delivery

Signed For 1st Class

£2.90 - Monday 04 March

Collect from your Post Office

£3.95 - Monday 04 March

Special Delivery 1pm Guaranteed

£5.95 - Monday 04 March by 1pm

Special Delivery 9am Guaranteed

£13.95 - Monday 04 March by 9am

Same Day Delivery

from £4.95 - Sunday 03 March

How does it work?

How it works - Consultation

Online consultation

Complete a short questionnaire to check your eligibility for treatment

Refer a friend step 1

Choose a treatment

Select the treatment or medication you need from leading brands

How it works - Delivery

Express delivery

Medication is dispensed and delivered to your home or work