Phenergan

Phenergan Is Effective At Treating Allergies, Insomnia and Travel Sickness

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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.

Phenergan Reviews

9.6/ 10
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Based on 167 independent customer reviews taken by Feefo (see all Feefo Reviews), Google and Trustpilot (see all Trustpilot Reviews).


(read on Feefo)
"Discrete"

Product Review:

"Sorted my travel sickness as always"

Service Review:

"Fast discreet delivery"


(read on Feefo)
"Great Service"

Product Review:

"Great product, reasonable price"

Service Review:

"Great website, easy to navigate. Easy ordering and fast delivery. Highly recommend"

"Amazing service and quick delivery"

Product Review:

"Awesome "

Service Review:

"Amazing service and quick delivery"

"I had a great time shopping with…"

Product Review:

"I think it is a great product "

Service Review:

"I had a great time shopping with pharmica, they sent my item very quickly"


(read on Feefo)
"Excellent"

Product Review:

"Easy to navigate the website. The whole order process was very simple."

Service Review:

"I was extremely impressed with the service that I received."


(read on Feefo)
"Easy ordering system quick delivery."

Product Review:

"Products works well for intended use"

Service Review:

"Been very reliable. Website is easy to follow and delivery is very quick. You are also not harrased with lots of emails and texts after you have perchased your products."


(read on Feefo)
"Ordered without fuss an received delivery quickly"

Product Review:

"Excellent for short term sleep problems"

Service Review:

"Ordered easily and delivered quickly"

"Great service"

Product Review:

"Worked wonders for hay fever"

Service Review:

"Great service. Fast and trustworthy"


(read on Feefo)
"Great, quick service."

Product Review:

"Quick and efficient, easy to use website, unbranded discreet packaging."

Service Review:

"Great, quick and efficient service with a range of delivery options. Arrived ahead of schedule, in unbranded packaging. As a repeat customer I throughly recommend."

"Very fast service highly recommended"

Product Review:

"This product really helps me with the strong hay fever and allergies "

Service Review:

"Very fast service highly recommended"

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 - Thursday 08 June

Collect from your Post Office

£3.95 - Thursday 08 June

Special Delivery 1pm Guaranteed

£5.95 - Thursday 08 June by 1pm

Special Delivery 9am Guaranteed

£13.95 - Thursday 08 June by 9am

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from £4.95 - Wednesday 07 June

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