Phenergan

Phenergan Is Effective At Treating Allergies, Insomnia and Travel Sickness

Phenergan
Phenergan 1
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Treat allergies, insomnia or travel sickness with this effective antihistamine.

Strength: 25mg

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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.

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 our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 25 Oct 2023

Phenergan Reviews

9.6/ 10
5
162
4
15
3
0
2
1
1
3
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Based on 181 independent customer reviews taken by Feefo (see all Feefo Reviews), Google
and Trustpilot (see all Trustpilot Reviews).

Reviewed on Feefo

Product Review:

Exactly what I requested and arrived promptly

Service Review:

Excellent quick service.


Reviewed 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


Reviewed on Feefo
"Speedy delivery"

Product Review:

Does what’s needed , works well

Service Review:

Arrived quickly


Reviewed on Trustpilot
"Great customer service and super fast…"

Product Review:

Fab service super fast deluvery

Service Review:

Great customer service and super fast delivery highly recommend


Reviewed on Feefo
"Great service Thank you Would buy again"

Product Review:

Great experience no issues

Service Review:

5 star quick delivery


Reviewed on Feefo
"came in two days as promised"

Product Review:

They help me relax and do what they should

Service Review:

yes excellent service


Reviewed 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


Reviewed on Trustpilot
"Very good tabs help with sleep at night"

Product Review:

Very good

Service Review:

Very good tabs help with sleep at night


Reviewed 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.


Reviewed 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


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 - Sunday 19 May

Collect from your Post Office

£3.95 - Sunday 19 May

Special Delivery 1pm Guaranteed

£5.95 - Sunday 19 May by 1pm

Special Delivery 9am Guaranteed

£13.95 - Sunday 19 May by 9am

Same Day Delivery

from £4.95 - Saturday 18 May

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How it works - Consultation

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How it works - Delivery

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