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Phenergan Night Time 25mg (Promethazine) - 14 Tablets

Based on 48 reviews
Out of stock
25mg - Night Time £11.99
10mg £9.99
Laura Henderson - Medical Content Writer
Laura Henderson
Medical Content Writer
James O'Loan - CEO & Superintendent Pharmacist
James O'Loan
CEO & Superintendent Pharmacist

What is Phenergan Night Time?

Phenergan Night Time tablets are a treatment for sleepless nights and insomnia, using an ingredient called promethazine to help you get to sleep. It makes you feel drowsy or tired, making it easier for you to drift off for your much needed 8 hours of sleep. Phenergan Night can be used by adults and children over 16, and it’s an ideal solution to sleepless nights caused by exam stress, work worries, or jet lag after your holiday.

Why can’t I fall asleep?

Short-term insomnia, which simply means that you can’t fall asleep, is completely normal, and you’ll usually experience it at least once in your life. It can happen for lots of different reasons, will often clear up by itself, and usually isn’t anything to worry about, even if it is annoying!

Some of the most common reasons why you may be lying awake counting sheep include:

  • Stress, anxiety, or depression

  • Jet lag

  • Shift work

  • A noisy environment

  • An uncomfortable bed

  • Being too hot or too cold

  • Drinking alcohol or caffeine

  • Smoking

  • Taking recreational drugs

  • Some medications or medical conditions

How will the promethazine in Phenergan Night Time treat my insomnia?

Phenergan Night Time tablets contain 25mg of promethazine, which is a type of medication called a phenothiazine. It works by blocking a substance called histamine in your body, which is created when you have an allergic reaction and can have a stimulant effect. This helps you to feel drowsy and makes it easier for you to drop off to sleep.

Can I take these sleeping tablets during my pregnancy?

If you’re pregnant you should speak to your doctor before taking Phenergan Night Time. You will usually be advised to avoid any unnecessary medications during your pregnancy so you should only take this product if your doctor has told you that the benefits would outweigh the potential effects on your child. You should not take this medicine within 2 weeks before you’re due to give birth or when you’re breastfeeding. The promethazine in these tablets can pass into your breast milk in small amounts, which could be harmful to your baby.

Will this treatment work with my regular medication?

If you’re taking any other medication, including herbal remedies or medicines you obtained without a prescription, you should speak to your doctor or pharmacist before taking Phenergan Night tablets. This especially applies if you are already taking:

  • Monoamine Oxidase Inhibitors (MAOIs), which are used for depression. You should not take Phenergan if you’ve taken MAOIs within the last 2 weeks

  • Anticholinergic medicines, which are used for IBS, asthma, or a weak bladder

  • Depression medications, e.g. amitriptyline

  • Medicines to help you fall asleep or feel relaxed, e.g. diazepam, zolpidem

  • Medicines for arthritis or joint pain, e.g. aspirin, ibuprofen, and other NSAIDs

Can I drive when I’ve taken these tablets?

Phenergan Night tablets make you feel drowsy or tired so they can help you to fall asleep. For this reason, you shouldn’t attempt to drive or use tools or machinery after taking these tablets. You should wait until any drowsiness or other symptoms that would reduce your attention or concentration have completely passed before you attempt to drive again.

Can I drink alcohol if I’m taking these tablets?

You shouldn’t drink alcohol while you’re taking Phenergan Night, as it can affect the way your medication works. For example, it can increase the drowsiness you experience after taking this medication and can also make other side effects more likely.

What’s the usual dose of Phenergan Night?

Take one or two tablets before you go to bed at night. Swallow the tablets with a sip of water. Do not take Phenergan Night for more than 7 days at a time, if your symptoms haven’t improved after 7 days you should speak to your doctor or pharmacist.

When should this product not be used?

Phenergan Night tablets are not suitable for use in children under the age of 16. Do not use this product if you are allergic to promethazine hydrochloride or any of the other listed ingredients. This product should not be taken by those who are:

  • In a coma

  • Suffer from severe dizziness, drowsiness or headaches

Speak to your doctor or pharmacist before taking this product if you have:

  • Asthma or bronchitis

  • Epilepsy

  • Any serious heart problems

  • Liver or kidney problems

  • A stomach blockage or difficulty peeing

  • Hearing problems

  • Increased pressure in the eye, e.g. narrow angle glaucoma

  • Reye’s Syndrome, which causes symptoms such as being sick and confused following a viral illness

  • An intolerance to some sugars, as this product contains lactose

Does Phenergan Night have any side effects?

Like all medications, Phenergan Night tablets can have side effects, although not everyone can experience them. If you experience any of the following side effects you should stop use and seek immediate medical help:

  • Symptoms of severe allergic reaction, e.g. rash, difficulty breathing or swallowing, swelling of the face, lips, mouth, tongue, or throat

  • Liver problems causing jaundice symptoms, e.g. yellowing of the eyes or skin

  • Muscle stiffness, shaking

  • Being unable to control the muscles in your head or face

  • Unusual movements of the tongue, facial muscle spasms, rolling eyes, trembling

  • Very fast, uneven, or forceful heartbeat (palpitations)

  • Irregular heartbeat

  • Tiredness which lasts for a long time, which may be caused by anaemia

Other side effects you may experience include:

  • Dry mouth, blurred vision, finding it difficult to pee

  • Drowsiness, sleepiness, tiredness, disorientation, nightmares, headaches, restlessness

  • Loss of appetite, indigestion

  • Dizziness, lightheadedness, feeling faint

  • Confusion, especially in elderly people

  • Sensitivity to sunlight, keep out of direct sunlight and do not use sun lamps if this happens to you

  • Restless Legs Syndrome

If you experience these or any other side effects while using this product, speak to your doctor or pharmacist. For more information about reporting the side effects of medication, please see the MHRA’s Yellow Card Scheme.

How to store these tablets

Store in a cool, dry place which is below 30 degrees C. Do not take this product if the expiry date printed on the original packaging has passed. Keep out of sight and reach of children.

Can I buy Phenergan Night over the counter?

You do not need a prescription for Phenergan Night Time, however, you will be asked to complete a short online survey from our pharmacists before we can take your order. This includes some simple questions that all pharmacies legally are required to ask before supplying this kind of product. This helps our pharmacy team to be sure that this product is the best choice for you.


Important information

This product is a medicine; make sure to speak to your doctor or Chemist4U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here

If you are concerned about an addiction to 'over the counter' medication we urge you to visit the below links for professional help and advice

Phenergan Night Time 25mg (Promethazine) - 14 Tablets Reviews

By Judith,
April 30, 2024
Very quick delivery, order complete
By Julia Salmon,
April 30, 2024
Helps me sleep
By Ms Bailey,
November 07, 2023
Gives a good night's sleep, quick acting but doesn't stop early waking which is what I wanted it for. Only taken one tablet at a time at the moment so will try 2 tonight
By Julia Salmon,
November 07, 2023
Helps me to get a good nights sleep
By Tara Rankin,
October 31, 2023
My purchasewas marked as delivered but never arrived, so I cannot comment on the quality. I will not be using Chemist4u again.

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