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Night Nurse liquid

from£8.99

  • Triple-action UK Pharmacy medicine combining paracetamol, promethazine, and dextromethorphan for nighttime cold and flu relief
  • One 20ml bedtime dose tackles aches, fever, runny nose, sneezing, sore throat, and tickly cough — and helps you sleep
  • For adults and children aged 16+; not licensed for under-16s
  • Pharmacist-supplied with no prescription needed; green aniseed-flavoured liquid
  • Pack size: 160ml

TREATS:

Coughs and colds

FORMAT:

Oral liquid

Availability:

In stock

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Night Nurse liquid

Description

Product description: Night Nurse Liquid

Cold and flu symptoms keep people awake. After all, when you’re trying to recover, broken sleep makes everything worse — symptoms feel more pronounced, the immune response is less effective, and the next day feels even harder. So a single bedtime dose that tackles aches, nose, throat, cough, AND helps you sleep is genuinely useful. Night Nurse has held this position in the UK pharmacy market for decades.

The format also matters. Specifically, the liquid suits people who can’t swallow capsules or want something that works quickly. In addition, the warm aniseed flavour can feel soothing for a sore throat. However, those who prefer something more discreet may want Night Nurse Capsules instead — same actives, different format.

Where Night Nurse fits in cold and flu treatment

The UK approach to cold and flu management follows a sensible path:

  • Step 1: Rest, hydration, warmth, and steam inhalation — the basics of recovery
  • Step 2: Single-ingredient products for specific symptoms — paracetamol for aches, salt water gargles for sore throat, plain steam for blocked nose
  • Step 3: Multi-symptom daytime products — Day Nurse, Lemsip, Beechams for handling multiple symptoms while staying alert
  • Step 4: Multi-symptom nighttime products — Night Nurse for the sleep-disrupting cluster of symptoms
  • Step 5: Targeted second-line products — Sudafed for stuffy nose, Strepsils for sore throat, Robitussin for cough
  • Step 6: GP review — if symptoms persist beyond a week or worsen significantly
  • Step 7: Antibiotics — only if a bacterial complication develops (pneumonia, sinus infection)
  • Step 8: Hospital assessment — for severe symptoms, breathing difficulty, or complications

Night Nurse sits at Step 4 — alongside other multi-symptom nighttime products. So it’s a thoughtful choice when single ingredients haven’t been enough but the situation hasn’t reached the point of needing GP review.

Night Nurse Liquid vs Night Nurse Capsules

Same actives, different formats:

  • Night Nurse Liquid (this product): green aniseed-flavoured solution, 20ml bedtime dose
  • Night Nurse Capsules: same actives in two capsules taken at bedtime
  • Liquid works faster as it’s already in solution
  • Capsules avoid the taste of the liquid (some people dislike aniseed)
  • Capsules are more portable for travel
  • Liquid may soothe a sore throat as it goes down
  • Same effectiveness when used correctly

Night Nurse vs Day Nurse

Designed for different times of day:

  • Night Nurse: paracetamol + promethazine (sedating) + dextromethorphan (cough)
  • Day Nurse: paracetamol + pseudoephedrine (decongestant) + pholcodine (cough)
  • Night Nurse causes drowsiness — not for daytime use
  • Day Nurse unblocks the nose without causing drowsiness
  • Day & Night Nurse packs contain both for 24-hour coverage
  • Don’t mix the doses — follow the Day vs Night routine

Night Nurse vs Lemsip products

Different families of cold and flu remedies:

  • Night Nurse: liquid with sedating antihistamine for nighttime use
  • Lemsip Max All-in-One: hot drink with paracetamol, phenylephrine (decongestant), guaifenesin (mucus loosener)
  • Lemsip doesn’t typically cause sedation, so suits daytime
  • Night Nurse is the better fit for bedtime symptoms
  • Some people use Lemsip during the day and Night Nurse at night
  • Don’t take the two together — both contain paracetamol

Night Nurse vs simple paracetamol

Different levels of treatment:

  • Simple paracetamol: tackles aches, pain, and fever only
  • Night Nurse: tackles aches/pain/fever PLUS runny nose, cough, and sleep difficulty
  • Paracetamol is cheaper and suits milder symptoms
  • Night Nurse fits when multiple symptoms are disrupting sleep
  • Simple paracetamol alone often isn’t enough for the full nighttime cold symptom cluster

Night Nurse vs Sudafed Mucus Cough Liquid

Different focus:

  • Night Nurse: full multi-symptom relief including sleep aid
  • Sudafed Mucus Cough Liquid: targeted cough and mucus action only
  • Pick Sudafed Mucus Cough if cough is the dominant symptom
  • Pick Night Nurse if multiple symptoms are keeping you awake
  • They shouldn’t be combined as Sudafed Mucus Cough may contain similar actives

Who Night Nurse suits well

This product may suit:

  • Adults and children aged 16+ with cold or flu symptoms disrupting sleep
  • People with multi-symptom colds (nose, throat, cough, aches all together)
  • People who’ve taken something during the day but need different overnight cover
  • People with a tickly non-productive cough disturbing sleep
  • Anyone wanting a single bedtime dose rather than several products
  • People who can dedicate the next morning to rest if needed (morning grogginess can happen)
  • People at home rather than caring for young children overnight
  • Anyone who doesn’t need to drive or operate machinery the next morning

Who might suit other options better

Other options may suit better for:

  • Children under 16 — Night Nurse isn’t licensed for this age group
  • Pregnant women — talk to your GP first about cold remedies
  • Breastfeeding women — talk to your GP first
  • People taking MAOIs (a type of antidepressant) — within 2 weeks of stopping or while taking
  • People with severe respiratory conditions like COPD or active asthma flare
  • People with severe kidney or liver problems
  • People with QT prolongation or significant cardiac arrhythmia history
  • People who need to drive the next morning
  • Parents needing to be alert for childcare overnight
  • People with productive (chesty) coughs where bringing up phlegm matters
  • People already on paracetamol from another product (overdose risk)
  • People who can’t tolerate sedating antihistamines
  • People with severe alcoholism, untreated diabetes, or on low-sodium diets

Courier Pharmacy supply

Night Nurse is a UK Pharmacy (P) medicine. So our pharmacist supplies it after a brief check that it suits your situation — no prescription needed. In short, this isn’t a prescriber consultation, just a quick pharmacist confirmation. If our pharmacist decides another approach would suit better — simple paracetamol, single-symptom products, or GP review for severe symptoms — we’ll mention that.

Key features and specs

  • Active ingredients per 20ml dose: paracetamol 1000mg, promethazine hydrochloride 20mg, dextromethorphan hydrobromide 15mg
  • Form: green aniseed-flavoured oral solution
  • Pack sizes: typically 160ml (some 100ml packs also available)
  • Dose: one 20ml dose at bedtime
  • Age range: adults and children 16+
  • Maximum dose: one 20ml dose in 24 hours
  • Maximum duration: 3 days continuously without medical advice
  • Contains: small amount of ethanol (alcohol)
  • Effects start: within 30 minutes typically
  • Sleep effect lasts: 4-8 hours typically
  • Pregnancy: not recommended without medical advice
  • Breastfeeding: not recommended without medical advice
  • Storage: as labelled, typically room temperature
  • Legal status: Pharmacy medicine (P)
  • Maker: Haleon UK Trading Limited

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Overview

Active ingredients

What is it for?

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Warnings and precautions

Side effects

Drug interactions

FAQs

Download patent leaflet

Written By
Shazlee Ahsan
BSc Pharmacy, Independent Prescriber, PgDip Endocrinology, MSc Endocrinology, PgDip Infectious Diseases

Superintendant Pharmacist, Independent Prescriber


Checked By
Safdar Ali
BSc Pharmacy

Pharmacist


Night Nurse Liquid — Triple-Action Nighttime Cold and Flu Relief

Night Nurse Oral Solution is the UK’s best-known nighttime cold and flu remedy — designed to relieve cold symptoms AND help you sleep through the night. So it combines three actives in one green aniseed-flavoured liquid: paracetamol for aches, pains and fever; promethazine for runny nose and to help sleep; and dextromethorphan to settle a tickly cough. As a result, one 20ml dose at bedtime tackles the cluster of symptoms that keep people awake when they’re unwell. Important: this is a UK Pharmacy (P) medicine for adults and children aged 16 and over. Made by Haleon.

At Courier Pharmacy, we believe in treatment that fits the person.

This page covers what Night Nurse does, who it suits, how it sits alongside other cold and flu options, and the practical points that matter.

Five key takeaways

  • Night Nurse is a UK Pharmacy (P) medicine — so it’s supplied through pharmacists rather than prescribers. After all, this means our pharmacist confirms suitability before supply, but no prescription is needed
  • Triple-action formulation: paracetamol (pain and fever relief), promethazine (sedating antihistamine for sleep and runny nose), and dextromethorphan (cough suppressant). So one dose handles the main symptoms that keep you awake when you have a cold or flu
  • Designed for nighttime use only. In short, take 20ml about 20 minutes before going to bed — the promethazine causes pronounced drowsiness, so it isn’t suitable for daytime
  • For adults and children aged 16 and over. So it isn’t licensed for under-16s due to age restrictions on dextromethorphan and promethazine in OTC products
  • Important practical points: don’t take with other paracetamol products (overdose risk), don’t take with other antihistamines, and don’t drive within several hours of taking. Also avoid alcohol

Why choose Courier Pharmacy for Night Nurse

At Courier Pharmacy, our approach starts with a simple idea: treatment should fit the person, not force the person to fit the system.

Dr Ada Jex-Cori

Our service is shaped by the philosophy of Dr Ada Jex-Cori, our brand pharmacist.

Dr Ada represents the spirit of the pharmacy: evidence-led, community-rooted, and willing to challenge the one-size-fits-all approach to medicine. She is named in honour of three pioneering women in science: Ada Lovelace, the mathematician and visionary; Sophia Jex-Blake, the first female doctor in the UK who fought the medical establishment; and Gerty Cori, the biochemist and Nobel Prize winner.

In our fictional world of Etherwell, Dr Ada fights against pharma’s standardised approach to medicine. In the real world, she represents what we stand for. Her view is straightforward: you are not broken. The system is. And we are here to change that.

Dr Ada Jex Cori at courierpharmacy.co.uk holding a coupon

Self-care that respects your time

Colds and flu are usually self-limiting. So while you’re waiting them out:

  • Sleep matters genuinely — the immune system works hardest during sleep
  • Multi-symptom relief means one dose instead of several
  • Recognising when something isn’t working matters too
  • Most colds resolve within a week without medical intervention
  • Symptom relief is the goal, not a cure

After all, the right product at the right time can make a real difference to recovery. So our pharmacist will be straight about whether Night Nurse fits your symptoms.

Honest framing about when this isn’t the right step

Night Nurse suits a specific window:

  • Mild to moderate cold and flu symptoms
  • Symptoms genuinely disrupting sleep
  • First few nights of an illness
  • When you can stay home and rest

It doesn’t suit:

  • Symptoms of more than a week — see your GP
  • High persistent fever — needs assessment
  • Severe throat pain or difficulty swallowing — could be tonsillitis or strep
  • Productive cough with discoloured phlegm — possible chest infection
  • Breathing difficulty — needs urgent assessment
  • Symptoms in pregnancy or breastfeeding — talk to GP or midwife
  • Symptoms in under-16s — different products may suit

In short, we’d rather steer you toward the right help than sell you a product that won’t fit. After all, that’s what genuine pharmacy care looks like.

Pharmacist support before and after purchase

Our pharmacist is here to discuss:

  • Whether Night Nurse is the right product for your symptoms
  • How it fits with any other medicines you take
  • How to use it safely (timing, dosage, driving)
  • When to stop and see a GP if symptoms persist
  • Other options if Night Nurse doesn’t suit

This is free and on hand before and after purchase.

Trust earned, not claimed

We are GPhC-regulated, and our content is grounded in the BNF, NICE Clinical Knowledge Summaries on cold and flu management, NHS guidance, and the real experience of people managing seasonal infections.

If Night Nurse isn’t the right answer for your situation, we’ll tell you honestly. After all, getting the right treatment matters more than fulfilling a request.

How to buy Night Nurse from Courier Pharmacy

Night Nurse is a UK Pharmacy (P) medicine. So our pharmacist supplies it after a brief check — no prescription needed.

How our service works

  1. Add Night Nurse to your basket on courierpharmacy.co.uk
  2. Complete the brief consultation covering your symptoms, age, current medicines, and relevant medical history
  3. Our pharmacist reviews your answers to confirm suitability
  4. If a different approach would suit better — simpler single-ingredient products, or GP review for severe symptoms — we’ll get in touch
  5. Once approved, your order is dispatched in plain, discreet packaging
  6. Free pharmacist support is on hand before and after your purchase

When other options might suit better

If Night Nurse isn’t right, we’ll explain why. Other options may include:

  • Day Nurse: non-sedating daytime version with decongestant
  • Day & Night Nurse capsules: both day and night doses in one pack
  • Simple paracetamol or ibuprofen: for milder symptoms with just aches and fever
  • Lemsip Max All-in-One: hot drink with paracetamol and phenylephrine
  • Sudafed Mucus Cough Liquid: for cough-dominant symptoms
  • Strepsils or simple throat lozenges: for sore throat alone
  • Saline nasal sprays: for nasal symptoms alone
  • Steam inhalation with menthol: drug-free congestion relief
  • GP referral: for symptoms beyond a week or severe symptoms
  • Flu vaccination: prevention rather than treatment for next year

Our community service

Our free fortnightly drop-in clinics at Insomnia, Derby run every other week from 10am to 12pm.

Healthcare shouldn’t only happen when you’re paying for it. So we show up, even when it’s free.

We cover cold and flu management, sleep difficulties, allergies, asthma, MCAS, menopause, dermatology, hair loss, men’s and women’s health, digestive health, weight management, and whatever else people bring through the door. No appointment needed, no charge, no pressure.

Dr Ada Jex Cori at courierpharmacy.co.uk holding a coffee 2

Active ingredients

Each 20ml dose of Night Nurse contains:

  • Paracetamol 1000mg: a pain-reliever and fever-reducer
  • Promethazine hydrochloride 20mg: a sedating antihistamine
  • Dextromethorphan hydrobromide 15mg: a cough suppressant

Why paracetamol

Paracetamol handles the pain and fever side of cold and flu:

  • Reduces fever (the raised body temperature that comes with viral infections)
  • Eases body aches and muscle pain
  • Helps with headache often linked to fever and sinus pressure
  • Soothes sore throat
  • Works on pain and temperature regulation centres in the brain
  • Generally well-tolerated when used at the right dose

In short, paracetamol addresses the body-wide discomfort of a cold or flu. After all, fever and aches alone can keep someone awake even without the nose and cough symptoms.

Why promethazine

Promethazine is a first-generation sedating antihistamine. So it does several jobs:

  • Dries up a runny nose by blocking histamine receptors
  • Reduces sneezing
  • Provides pronounced drowsiness — helping you fall asleep faster
  • Has a mild anti-cough effect of its own
  • Helps reduce postnasal drip (mucus running down the throat)
  • Lasts long enough to cover most of the night

This is the ingredient that defines Night Nurse as a nighttime product. After all, the drowsiness that would be a problem during the day is exactly what you want when trying to sleep through a cold.

Why dextromethorphan

Dextromethorphan tackles the cough side:

  • Acts on the cough centre in the brain
  • Suppresses the urge to cough
  • Especially useful for tickly, dry, non-productive coughs
  • Not the same class as codeine or other opioid cough suppressants
  • Doesn't typically cause significant additional drowsiness

In short, dextromethorphan handles the cough that keeps coming back when you're trying to fall asleep. So combined with the other actives, it gives a more complete nighttime symptom solution than any single ingredient.

Why the combination works

Triple-action means tackling cold and flu symptoms together:

  • Fever and aches reduced (paracetamol)
  • Runny nose dried up (promethazine)
  • Cough settled (dextromethorphan)
  • Sleep induced (promethazine's drowsiness)
  • One dose covers most of the night
  • Avoids the need to take several separate products

After all, taking three separate medicines at bedtime is harder than taking one. So Night Nurse's combination approach has been a UK staple since the 1980s for this reason.

Other ingredients

Night Nurse Oral Solution also contains:

  • Ethanol (alcohol — a small amount as a solvent)
  • Sodium cyclamate (sweetener)
  • Aniseed oil (flavouring)
  • Caramel (colouring — gives the green-tinged appearance)
  • Sodium hydroxide and citric acid (pH adjusters)
  • Liquid maltitol
  • Purified water

The full ingredient list is in the patient information leaflet supplied with the product. So mention any known sensitivities to our pharmacist.

Maker

Night Nurse is made by Haleon UK Trading Limited — the consumer healthcare company that spun off from GSK in July 2022. So Haleon now owns many of the UK's best-known household healthcare brands, including Sensodyne, Voltarol, Otrivine, Panadol, and the Day Nurse / Night Nurse range. The Night Nurse brand has been a UK staple since the 1980s, with the central tagline "the cold remedy to help you sleep through the night."

Dr Ada Jex Cori measuring active pharmaceutical ingredients on a weighing scale courierpharmacy.co.uk

What is Night Nurse for?

Night Nurse provides symptom relief from colds, chills, and flu at night. So it's designed for the cluster of symptoms that disrupt sleep when you're unwell: blocked or runny nose, sneezing, sore throat, aches and pains, mild fever, and a tickly cough. All in one dose at bedtime. As a result, the central goal is to help you rest properly so your body can recover overnight.

Who is it for?

Night Nurse may suit adults and children aged 16+ who have:

  • Cold or flu symptoms that are disrupting sleep
  • A blocked or runny nose with sneezing
  • Sore throat with mild fever
  • Aches and pains from a cold or flu
  • A tickly or non-productive cough that's keeping them awake
  • Multiple symptoms that would otherwise need several different products
  • A few nights of broken sleep due to a cold and want to break the cycle

What does it do?

Night Nurse works through three different mechanisms at the same time. First, paracetamol reduces fever and eases aches, pains, and sore throat. Second, promethazine — a sedating antihistamine — dries up a runny nose, reduces sneezing, and causes drowsiness to help you sleep. Third, dextromethorphan suppresses the cough reflex in the brain to settle a tickly cough. So all three actions work together to address the symptoms that typically disrupt sleep during a cold or flu.

What it doesn't do

Night Nurse doesn't cure or shorten a cold or flu. So it manages symptoms while your immune system fights the infection. In addition, it doesn't unblock a stuffy nose (it has no decongestant component — Day Nurse has pseudoephedrine for that), doesn't treat bacterial chest infections, and doesn't act as a true sleep medicine for ongoing insomnia. Finally, Night Nurse isn't designed for productive (chesty) coughs where bringing up phlegm is part of the recovery — suppressing those types of cough can sometimes worsen the infection.

Dr Ada Jex Cori from courierpharmacy.co.uk with a cold

How Night Nurse works

Night Nurse delivers three different mechanisms in one dose. So understanding what each ingredient does helps explain why the combination works.

How paracetamol works

Paracetamol acts on pain and temperature pathways:

  1. Absorbed quickly from the stomach and small intestine
  2. Reaches the brain within 30-60 minutes
  3. Acts on pain-processing centres to reduce pain perception
  4. Acts on the hypothalamus to reset the body's temperature thermostat
  5. Reduces fever back toward normal range
  6. Effect lasts 4-6 hours typically

How promethazine works

Promethazine is a sedating first-generation antihistamine:

  1. Blocks histamine H1 receptors throughout the body
  2. This dries up a runny nose by reducing histamine-driven secretions
  3. Also reduces sneezing and watery eyes
  4. Crosses the blood-brain barrier easily
  5. This causes drowsiness — usually within 30 minutes
  6. Sleep effect lasts 4-8 hours
  7. Has additional mild anti-emetic (anti-nausea) and anti-cough properties

In short, promethazine is what makes Night Nurse a nighttime product. After all, the drowsiness is intentional — not a side effect to avoid.

How dextromethorphan works

Dextromethorphan suppresses the cough reflex:

  1. Acts on the cough centre in the medulla (the brainstem)
  2. Reduces the brain's sensitivity to cough-triggering signals
  3. Especially effective for tickly, dry, non-productive coughs
  4. Doesn't typically cause significant drowsiness on its own
  5. Effect starts within 30 minutes and lasts 4-6 hours
  6. Not the same class as codeine — non-opioid cough suppressant

Why the combination matters at night

Three active ingredients tackling three different symptom clusters:

  • Aches, pain, fever (paracetamol)
  • Runny nose, sneezing, sleep difficulty (promethazine)
  • Tickly cough (dextromethorphan)
  • All in one 20ml dose
  • All starting to work within 30 minutes
  • All providing coverage through most of the night

After all, taking three separate medicines at bedtime is harder to manage than one. So Night Nurse's combination approach simplifies nighttime cold management.

Dr Ada Jex Cori at courierpharmacy.co.uk thinking and looking into the distance

How to use Night Nurse

This summary is for reference only. The definitive guide is the patient information leaflet supplied with the bottle. So if anything isn't clear, contact our pharmacist.

Standard dosing

For adults and children aged 16 and over:

  1. Take one 20ml dose at bedtime
  2. Use the measuring cup or spoon provided with the bottle
  3. Take about 20-30 minutes before going to bed
  4. Don't take more than one 20ml dose in 24 hours
  5. Don't take more than 3 nights continuously without medical advice
  6. Don't drive after taking Night Nurse
  7. Avoid alcohol while using Night Nurse

Using the measuring cup

Accurate dosing matters:

  • Use the cup or spoon supplied with the bottle
  • Don't guess the dose with a household teaspoon
  • Fill to the 20ml line for adults — typically the full cup
  • Drink in one or two sips
  • Rinse the measuring cup or spoon after use

When to take it

Timing matters:

  • Take 20-30 minutes before you plan to go to bed
  • Don't take during the day if you need to function normally
  • Don't take Night Nurse if you'll be driving within the next 8 hours
  • Don't take if you're caring for a baby or young child overnight
  • Allow time for the morning drowsiness to clear before driving the next day

What to do alongside

Help Night Nurse work better:

  • Stay hydrated — drink fluids throughout the day
  • Rest — sleep is when your immune system fights infection
  • Keep warm — a warm room helps sleep
  • Steam inhalation — can help loosen nasal congestion
  • Saline nasal sprays — clear the nose before bed for better sleep
  • Avoid alcohol — interacts poorly with Night Nurse and worsens dehydration
  • Don't smoke — slows recovery

If you miss a dose

Don't worry. So:

  • Skip the missed dose and take the next dose at the usual time
  • Don't double up to make up for a missed dose
  • If you're feeling much better, you can simply stop taking it

How long to use Night Nurse

Time-limited use only:

  • Maximum 3 nights continuously without medical advice
  • Most colds resolve within a week, so 3 nights of Night Nurse usually fits
  • If symptoms persist beyond 3 nights, see your GP
  • Don't use as a regular sleep aid — it isn't designed for that

Driving and the morning after

Plan around the drowsiness:

  • Don't drive within several hours of taking Night Nurse
  • Morning drowsiness can persist into the next day
  • Don't drive the morning after if you feel groggy
  • Allow extra time before any activity needing alertness
  • Promethazine can affect reaction times for 12+ hours in some people

Storage

  • Store at room temperature as labelled
  • Don't freeze
  • Replace the cap securely after use
  • Keep out of sight and reach of children
  • Don't use after the expiry date
  • Use within the time stated after opening
Dr Ada Jex Cori pouring medicine into a spoon courierpharmacy.co.uk

Warnings and precautions

Don't use Night Nurse if you

Don't use Night Nurse if you:

  • Are under 16 years old
  • Have a known allergy to paracetamol, promethazine, dextromethorphan, or any other ingredient
  • Have or are at risk of respiratory failure (COPD, pneumonia, asthma attack, severe asthma)
  • Have taken monoamine oxidase inhibitors (MAOIs) in the last 2 weeks
  • Are taking other paracetamol-containing products
  • Are taking other antihistamine-containing products
  • Are pregnant (unless your doctor advises otherwise)
  • Are breastfeeding (unless your doctor advises otherwise)

Use with care if you

Talk to our pharmacist before using if you:

  • Have severe kidney or liver problems
  • Have a history of QT prolongation or heart rhythm problems
  • Have significant cardiovascular disease
  • Have pronounced bradycardia (slow heart rate)
  • Are taking other medicines that affect heart rhythm
  • Have diabetes (the liquid contains a small amount of carbohydrate)
  • Are on a low-sodium diet
  • Have alcohol dependence
  • Are known to be a poor metaboliser of CYP2D6 enzymes
  • Take medicines that inhibit CYP2D6 (some antidepressants, antifungals, antibiotics)
  • Have epilepsy
  • Have glaucoma
  • Have prostate problems
  • Have severe constipation

Important paracetamol warnings

Paracetamol overdose can cause serious liver damage:

  • Don't take with other paracetamol-containing products
  • Check labels of all medicines — paracetamol hides in many cold remedies, painkillers, and combination products
  • Maximum daily paracetamol: 4g for adults (8 x 500mg tablets equivalent)
  • Don't double-dose if you miss a dose
  • In overdose, seek immediate medical advice EVEN IF YOU FEEL WELL
  • Liver damage can be delayed and may need hospital treatment

Important promethazine warnings

Promethazine is a sedating antihistamine:

  • Causes pronounced drowsiness
  • Don't drive or operate machinery within 12 hours of taking
  • Don't drink alcohol while using Night Nurse
  • Don't combine with other sedating medicines
  • Can occasionally cause confusion or memory problems, especially in older adults
  • Use the lowest dose for the shortest time

Important dextromethorphan warnings

Dextromethorphan has some specific interactions:

  • Don't combine with MAOI antidepressants
  • Caution with SSRIs (citalopram, sertraline, fluoxetine) — risk of serotonin syndrome
  • Caution with other serotonergic medicines
  • Poor CYP2D6 metabolisers may experience prolonged effects
  • Stop and seek medical advice if cough doesn't improve after 3 days

Driving and machinery

Night Nurse significantly affects driving ability:

  • Don't drive after taking Night Nurse
  • Don't operate heavy machinery
  • Drowsiness can persist into the next morning
  • Reaction times can be impaired for 12+ hours
  • If you must drive the next day, allow plenty of time to feel fully alert
  • Drug-driving laws apply — promethazine can lead to impairment penalties

Use in older adults

Older adults need extra care:

  • More likely to experience pronounced drowsiness
  • Higher risk of confusion or memory problems
  • Higher fall risk from drowsiness
  • More likely to have other medicines that interact
  • Older adults may benefit from simpler single-ingredient products
  • Our pharmacist may suggest alternatives in some older adults

Pregnancy and breastfeeding

Talk to your GP first:

  • Pregnancy: human data on the full combination is limited
  • Each ingredient has different safety considerations
  • Promethazine has been used in pregnancy for nausea, but the dextromethorphan combination needs medical advice
  • Breastfeeding: promethazine can pass into breast milk
  • Effects on the breastfed baby can include drowsiness
  • Talk to your GP or midwife about cold and flu options during pregnancy or breastfeeding

Pregnancy tests warning

Specific practical point:

  • Promethazine can interfere with urine-based pregnancy tests
  • May cause false positive or false negative results
  • If you need to do a pregnancy test, wait several days after your last dose
  • Blood-based pregnancy tests aren't affected
Dr Ada Jex Cori holding a warning sign courierpharmacy.co.uk

Side effects

Night Nurse is generally well-tolerated when used as directed. So most users only experience the intended drowsiness. When other side effects happen, they're usually mild.

Very common side effects

  • Drowsiness (this is the intended effect of promethazine)

Common side effects

  • Morning grogginess
  • Dry mouth
  • Headache
  • Dizziness
  • Blurred vision
  • Difficulty urinating
  • Constipation

Less common side effects

  • Nausea or vomiting
  • Skin rash
  • Increased sensitivity to sunlight
  • Confusion (especially in older adults)
  • Restlessness or paradoxical excitement (rare, more common in children)
  • Palpitations

Rare but serious side effects

  • Severe allergic reactions (swelling of face, lips, tongue, throat; breathing difficulty) — medical emergency
  • Serotonin syndrome (combination with serotonergic medicines)
  • Liver damage (with paracetamol overdose)
  • Heart rhythm changes (QT prolongation)
  • Severe skin reactions (Stevens-Johnson syndrome, toxic epidermal necrolysis)
  • Blood disorders (rare with paracetamol)
  • Significant respiratory depression in those with respiratory disease

Stop and seek urgent medical help if

  • You develop signs of severe allergic reaction
  • Severe skin rash, blistering, or peeling develops
  • Significant breathing difficulty develops
  • You suspect overdose (even if you feel well)
  • Severe abdominal pain develops (possible liver problem)
  • Yellowing of skin or eyes appears
  • Confusion or significant disorientation develops

Yellow Card reporting

If you notice any side effects, please report them through the MHRA Yellow Card scheme at https://yellowcard.mhra.gov.uk/, or talk to our pharmacist.

Dr Ada Jex Cori sleeping courierpharmacy.co.uk

Drug interactions

Night Nurse contains three active ingredients, so several interactions matter.

Important interactions to know about

Tell our pharmacist if you take:

  • MAOI antidepressants (phenelzine, tranylcypromine, isocarboxazid) — including within 2 weeks of stopping
  • SSRIs (sertraline, citalopram, fluoxetine, paroxetine) — caution due to dextromethorphan
  • Other antidepressants (mirtazapine, venlafaxine, duloxetine)
  • Other sedating medicines (benzodiazepines, zopiclone, opioids)
  • Other antihistamines (including topical creams and eye drops)
  • Other cold and flu remedies (especially those with paracetamol)
  • Anticonvulsants (carbamazepine, phenytoin)
  • Warfarin and other anticoagulants (paracetamol may affect INR)
  • Metoclopramide or domperidone (affect paracetamol absorption)
  • Colestyramine (reduces paracetamol absorption)
  • Medicines that affect QT interval
  • CYP2D6 inhibitors (fluoxetine, paroxetine, quinidine, terbinafine)

Don't combine with

Specifically avoid combining Night Nurse with:

  • Day Nurse (different product, different actives, but check labels)
  • Any other paracetamol-containing product (overdose risk)
  • Any other cold and flu remedy with similar actives
  • Any other product containing promethazine
  • Other sedating antihistamines (chlorphenamine, diphenhydramine, cetirizine, hydroxyzine)
  • Alcohol
  • Sleep medicines (zopiclone, zolpidem, benzodiazepines)

Generally fine alongside

Less concerning combinations:

  • Decongestant nasal sprays (saline, xylometazoline used short-term)
  • Throat lozenges (Strepsils, simple lozenges)
  • Vitamin and mineral supplements
  • Most common blood pressure medicines (although check with pharmacist)
  • Most diabetes medicines (although monitor blood glucose more carefully)
  • Topical pain creams
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Frequently asked questions

Dr Ada Jex Cori at courierpharmacy.co.uk FAQs

How quickly does Night Nurse work?

Effects start within 30 minutes:

  • Paracetamol begins working within 30-60 minutes
  • Promethazine drowsiness usually starts within 20-30 minutes
  • Dextromethorphan cough suppression begins within 30 minutes
  • Take 20-30 minutes before going to bed for best effect
  • Effects last 4-8 hours, covering most of the night

Can I take Night Nurse during the day?

No — Night Nurse is for nighttime use only:

  • The promethazine causes pronounced drowsiness
  • Not safe to drive or operate machinery after taking
  • Use Day Nurse during the day if you need cold and flu relief
  • Day Nurse contains different actives suited to daytime use

Can I take Night Nurse with other medicines?

Be cautious — Night Nurse interacts with several medicines:

  • Don't take with any other paracetamol-containing product (overdose risk)
  • Don't take with MAOI antidepressants (or within 2 weeks of stopping)
  • Don't take with other sedating medicines or antihistamines
  • Talk to our pharmacist about any prescription medicines you take
  • Bring your medicines list or photos of labels for our pharmacist to check

Can I drive after Night Nurse?

No, definitely not:

  • Don't drive after taking Night Nurse
  • Drowsiness can persist for 12+ hours
  • Don't drive the morning after if you feel groggy
  • Wait until you feel fully alert before driving
  • Drug-driving laws apply — promethazine can lead to impairment penalties

Can children take Night Nurse?

No, not under 16:

  • Night Nurse isn't licensed for under-16s
  • Different children's cold and flu products exist for younger ages
  • Calpol Six Plus, Calprofen, and others are designed for children
  • Talk to a pharmacist about age-appropriate products for younger children

Can I drink alcohol with Night Nurse?

No:

  • Alcohol increases the drowsiness and sedation
  • Alcohol can worsen the paracetamol effects on the liver
  • Alcohol also worsens dehydration during illness
  • Avoid alcohol completely while taking Night Nurse
  • Even small amounts can cause significant interaction

How long can I take Night Nurse for?

Maximum 3 nights continuously:

  • Most colds resolve within a week
  • 3 nights of Night Nurse covers the worst nights
  • If symptoms persist beyond 3 nights, see your GP
  • Don't use Night Nurse as a regular sleep aid — it isn't designed for that
  • Long-term promethazine use can cause tolerance and side effects

Will I feel groggy the next morning?

Sometimes yes:

  • Morning grogginess is common with Night Nurse
  • More pronounced in older adults
  • More pronounced if you don't sleep a full 8 hours
  • Drinking plenty of water helps clear the grogginess
  • Allow time before driving or important tasks

Can I use Night Nurse during pregnancy?

Talk to your GP or midwife first:

  • Not recommended without medical advice
  • Each component has different safety considerations
  • Promethazine has been used in pregnancy for nausea, but the combination needs medical advice
  • Simple paracetamol is generally safer for cold symptoms during pregnancy
  • Talk to your GP or midwife about pregnancy-safe cold remedies

Can I use Night Nurse while breastfeeding?

Talk to your GP first:

  • Not recommended without medical advice
  • Promethazine passes into breast milk
  • Can cause drowsiness in the breastfed baby
  • Simple paracetamol is often preferred while breastfeeding
  • Talk to your GP about breastfeeding-compatible options

What about the alcohol in Night Nurse?

Small amount, but worth knowing:

  • Night Nurse Oral Solution contains a small amount of ethanol as a solvent
  • The amount per dose is small
  • Could be a consideration for people avoiding all alcohol (religious reasons, recovering alcoholism)
  • Night Nurse Capsules don't contain alcohol — talk to our pharmacist if this matters

Will Night Nurse cure my cold?

No — and any product claiming this is overpromising:

  • Colds are caused by viruses
  • Your immune system has to fight off the virus
  • Night Nurse manages symptoms while your body recovers
  • Most colds resolve within a week
  • Rest and hydration are the most important parts of recovery

Can I take Night Nurse for hay fever or allergies?

No — better options exist for allergies:

  • Night Nurse contains promethazine, which is an antihistamine, but isn't designed for allergy management
  • Daily non-sedating antihistamines (cetirizine, loratadine, fexofenadine) suit allergies better
  • Steroid nasal sprays (Avamys, Beconase, Nasacort) help with allergic rhinitis
  • Don't use Night Nurse for ongoing allergy symptoms

How should I store Night Nurse?

Storage:

  • Room temperature as labelled
  • Don't freeze
  • Keep tightly closed
  • Keep out of sight and reach of children
  • Don't share between household members
  • Don't use after the expiry date

How do I order from Courier Pharmacy?

Add Night Nurse to your basket on courierpharmacy.co.uk and complete the brief pharmacist consultation. Our pharmacist will review your answers and confirm whether Night Nurse fits your situation. Your order goes out in plain, discreet packaging.

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More than a prescription: our community

Healthcare shouldn't only happen when you're paying for it.

Every fortnight we run free drop-in talks and clinics at Insomnia, Derby, from 10am to 12pm. So we show up, even when it's free.

Bring a question, bring a friend, bring a stack of bewildering letters from another clinic. We'll sit with you.

We cover cold and flu, sleep difficulties, allergies, asthma, MCAS, menopause, dermatology, hair loss, men's and women's health, digestive health, weight management, and whatever else people bring through the door. No appointment. No cost. No pressure. Just real support and treatment that fits.

This article is for information only and isn't a substitute for personal medical advice. Always speak to a qualified pharmacist or prescriber before starting cold and flu treatment, especially if you take other medicines, are pregnant or breastfeeding, or have underlying medical conditions. Symptoms lasting more than a week, severe symptoms, or breathing difficulty need urgent medical assessment.

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How this content was created

Written by the Courier Pharmacy editorial team and reviewed by a GPhC-registered pharmacist.

The content is grounded in the Haleon UK Trading Limited Summary of Product Characteristics for Night Nurse Oral Solution, NHS guidance on colds and flu, NICE Clinical Knowledge Summaries on common cold and influenza-like illness, and the real experience of pharmacists supporting people through seasonal infections. In addition, it draws on the real questions patients bring to our drop-in clinics in Derby.

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References

[1] Electronic Medicines Compendium (emc) (2025) Night Nurse — Summary of Product Characteristics (SmPC). Available at: https://www.medicines.org.uk/emc/product/354/smpc

[2] NHS (2024) Flu. Available at: https://www.nhs.uk/conditions/flu/

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Download patient leaflet

https://www.medicines.org.uk/emc/files/pil.354.pdf

Night Nurse liquid courierpharmacy.co.uk
Night Nurse liquid
from£8.99

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