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Cefalexin 125mg / 5ml Suspension

Active Ingredient:
cefalexin monohydrate
Flynn Pharma Ltd See contact details
ATC code: 
About Medicine
The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine.
Last updated on emc: 24 Nov 2023

Below is a text only representation of the Patient Information Leaflet (ePIL).

The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on {phone} 0800 198 5000. The product code(s) for this leaflet is: PL 13621/0023.

Cefalexin 125 mg/5 ml & 250mg/5ml Granules for Oral Suspension

Package leaflet: Information for the user

Cefalexin 125 mg/5 ml Granules for Oral Suspension

Cefalexin 250 mg/5 ml Granules for Oral Suspension

Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.
  • Keep this leaflet. You may need to read it again.
  • If you have any further questions, ask your doctor or pharmacist.
  • This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

What is in this leaflet

1. What Cefalexin is and what it is used for
2. What you need to know before you take Cefalexin
3. How to take Cefalexin
4. Possible side effects
5. How to store Cefalexin
6. Contents of the pack and other information

1. What Cefalexin is and what it is used for

Cefalexin contains the active ingredient cefalexin monohydrate, which is an antibiotic.

Cefalexin is used to treat the following infections caused by bacteria that can be killed by cefalexin:

  • Respiratory tract (lung and airways) infections e.g. tonsillitis, pharyngitis and bronchitis
  • Middle ear infection (otitis media)
  • Skin and soft tissue (e.g. muscle) infections
  • Bone and joint infections
  • Infections of the reproductive organs and urinary tract (e.g. cystitis), including acute inflammation of the prostate (prostatitis)
  • Dental infections.

2. What you need to know before you take Cefalexin
Do not take Cefalexin:
  • If you are allergic to cefalexin, other cephalosporins (similar antibiotics) or any of the other ingredients of this medicine (listed in Section 6). An allergic reaction may include rash, itching, difficulty breathing or swelling of the face, lips, throat or tongue.

Warnings and precautions

Talk to your doctor or pharmacist before taking Cefalexin if you:

  • have had an allergic reaction to cefalexin, cephalosporins, penicillins, or other drugs in the past
  • develop severe or prolonged diarrhoea during or after taking Cefalexin
  • have a severe kidney disorder (you may need a reduced dose)
  • have ever developed a severe skin rash or skin peeling, blistering and/or mouth sores after taking cefalexin or other antibacterials

Tell your doctor if you are having blood or urine tests. Cefalexin may interfere with these tests.

Acute generalised exanthematous pustulosis (AGEP) has been reported with the use of cefalexin. AGEP appears at the initiation of treatment as a red, scaly widespread rash with bumps under the skin and blisters accompanied by fever. The most common location: mainly localized on the skin folds, trunk, and upper extremities. The highest risk for occurrence of this serious skin reaction is within the first week of treatment. If you develop a serious rash or another of these skin symptoms, stop taking cefalexin and contact your doctor or seek medical attention immediately.

Other medicines and Cefalexin

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, including medicines obtained without a prescription. This is especially important of the following, as they may interact with your Cefalexin:

  • Any other antibiotics (e.g. gentamicin, tobramycin, cefuroxime)
  • Potent diuretics e.g. furosemide (water tablets used to treat high blood pressure or water retention)
  • Probenecid (a treatment for gout)
  • Metformin (a treatment for diabetes)
  • Drugs used to treat leukaemia.

It may still be all right for you to be given Cefalexin and your doctor will be able to decide what is suitable for you.

Pregnancy and breast-feeding

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

Driving and using machines

Cefalexin should not affect your ability to drive or use machines.

Important information about the ingredients of Cefalexin

Cefalexin contains sucrose. If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicine.

Also contains Allura Red (E129) which may cause allergic reactions.

This medicine contains less than 1 mmol sodium (23 mg) per 5ml, that is to say essentially ‘sodium free’.

3. How to take Cefalexin

Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

Your pharmacist should make up the suspension before you are given it.

The bottle is turned upside down and tapped to loosen the powder. Then a total of 60 ml water in two portions is added, shaking after each addition until all the powder is in suspension.

The suspension should be shaken well before use.


Adults and the elderly

The usual total daily dose is 1- 4 g orally, in divided doses.

  • Most infections can be treated by 500 mg every 8 hours. For skin and soft tissue infections, sore throat (streptococcal pharyngitis), and mild, uncomplicated urinary tract infections, the usual dose is 250 mg every 6 hours, or 500mg every 12 hours.
  • For more severe infections, larger doses may be needed. A reduced dose is needed for patients with severe kidney disorders.

Use in children

The usual total daily dose for children is 25-50 mg/kg (body weight) in divided doses.

  • For skin and soft tissue infections, sore throat, and mild, uncomplicated urinary tract infections, the total daily dose may be divided and administered every 12 hours.

For most infections the following schedule is suggested:

Children under 5 years: 125 mg every 8 hours.

Children 5 years and over: 250 mg every 8 hours.

In severe infections, the dose may be doubled. In the treatment of middle ear infections, a total daily dose of 75 to 100mg/kg in 4 doses is required.

If you have any further questions on the use of this product, ask your doctor or pharmacist.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Tell your doctor immediately if you get any sudden wheeziness, difficulty in breathing, swelling of the eyelids, face or lips, rash or itching (especially affecting your whole body).

Serious side effects

The following side effects are serious. You should stop taking this medicine and contact your doctor immediately if you experience them:

  • Serious peeling or blistering of the skin
  • Severe diarrhoea.
  • a red, scaly widespread rash with bumps under the skin and blisters accompanied by fever at the initiation of treatment (acute generalised exanthematous pustulosis). See also section 2.

The following side effects have been reported

  • Diarrhoea
  • Feeling sick (nausea)
  • Vomiting
  • Indigestion
  • Stomach pains
  • Measles-like rash, (alone)
  • Itching
  • Red wheals on the skin (urticaria) (alone)
  • Rash with wide spread joint pain and / or stiffness, swollen lymph glands, fever and, possibly, cloudy urine
  • Changes in blood counts, which may show up as bruising or a very tired feeling. You will need a blood test to confirm this.
  • Damage to your liver or kidneys which can only be detected by a blood and / or urine test
  • Jaundice (yellow skin and eyes)
  • Weakness
  • Fainting
  • Abnormally excitable behaviour
  • Agitation
  • Tiredness
  • Headache
  • Confusion
  • Dizziness
  • Seeing or hearing things (hallucinations)
  • Encephalopathy (non-inflammatory brain disease)
  • Convulsions
  • Myoclonus (muscle-twitching)
  • Itching of the vagina or anus caused by thrush (candidiasis).

Reporting of side effects

If you get any side effects talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet.

You can also report side effects directly via the Yellow Card Scheme Website: or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Cefalexin

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the bottle or carton after EXP. The expiry date refers to the last day of that month.

Do not store granules above 25°C.

After reconstitution, the suspension should be stored in a refrigerator (2°C-8°C).

Discard unused portion 10 days after dispensing.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help to protect the environment.

6. Contents of the pack and other information
What Cefalexin contains

The active substance is cefalexin monohydrate.

The other ingredients are:

Sucrose, imitation guarana flavour, allura red AC (E129), sodium lauryl sulphate, methylcellulose 15, dimeticone, xanthan gum and pregelatinised starch.

What Cefalexin looks like and contents of the pack

White granules which when reconstituted with water give a red suspension

Available in 100 ml plastic bottles with screw caps.

Marketing Authorisation Holder
Flynn Pharma Ltd
5th Floor
40 Mespil Road
Dublin 4
D04 C2N4

Via Laurentina Km 24,730
00071 Pomezia

This leaflet was last revised in June 2023.

Flynn Pharma Ltd
Company image
Hertlands House, Primett Road, Stevenage, Hertfordshire, SG1 3EE, UK
+44 (0)1438 727822
Medical Information e-mail
[email protected]
Medical Information Direct Line
+44 (0)1438 727822