Do I need to stop antihistamines before an allergy blood test?

No. Unlike skin-prick tests, blood tests for IgE are not affected by antihistamines, so keep taking your usual medicines.

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Allergy testing

Allergy Blood Tests in Slough & London

Q: Is an allergy blood test the same as a food intolerance test?

No. These tests look for an allergic (IgE) response. They do not test for food intolerances. A positive result shows sensitisation, which is best read alongside your symptoms.

Find out what's behind sneezing, rashes, wheezing or reactions to food. One blood sample checks for allergic sensitisation (IgE) to dozens of common allergens: foods, pollens, dust mites, pets and moulds. No GP referral needed.

From £65 No need to stop antihistamines Results in about 5 days UKAS-accredited lab

Not sure which test?

Most people start with the 30-allergen Atopic Screen. Or tell us your symptoms and we'll help you choose.

Book the Atopic Screen, £145 WhatsApp us Call 020 3633 2371

Which allergy test is right for you?

Pick the one that matches what you've noticed. Each is one blood sample at Slough, Victoria or Neasden.

Not sure / general symptomsAtopic Screen: 30 allergensThe best all-round test: milk proteins, egg, peanut, soya, fish, dust mites, cat, dog, pollens and moulds.£145~5 days Reactions to foodFood Screen: 20 foodsEgg, milk, wheat, peanut, tree nuts, sesame, shrimp, fish, celery and more.£99~5 days Hay fever, asthma, petsInhalation Screen: 20 allergensGrass and tree pollens, dust mites, pets (cat, dog, horse, rabbit, hamster) and moulds.£95~5 days Milk or gluten worriesMilk & Gluten ScreenCow's milk and its proteins (casein, alpha-lactalbumin, beta-lactoglobulin, BSA) plus gluten.£65~5 days For a childPaediatric Screen: 30 allergensThe common childhood allergens: milk, egg, peanut, hazelnut, fish, dust mite, pets and pollens.£145~5 days The widest checkALEX3: about 300 allergensAllergen extracts and molecular components, including insect venoms and latex, plus total IgE.£331~7 days

All allergy blood tests

Prices are for the test. A £25 blood draw is added per clinic visit, however many tests you book. For the "allergens of your choice" profiles, call or WhatsApp us and we'll help you choose before your appointment.

Test	What it covers	Results	Price
Milk & Gluten Screen (X)	Milk proteins, BSA and gluten	about 5 days	£65
Inhalation Screen (VIII)	20 airborne allergens	about 5 days	£95
Food Screen (IX)	20 foods	about 5 days	£99
Atopic Screen (VI)	30 food and airborne allergens	about 5 days	£145
Paediatric Screen (VII)	30 childhood allergens	about 5 days	£145
Atopic Screen + total IgE	The same 30 allergens plus your total IgE level	about 5 days	£155
Allergy Profile I + IgE	11 allergens of your choice plus total IgE	about 5 days	£183
UK Panel (IV)	16 of the most common UK allergens	about 5 days	£208
UK Panel + IgE (V)	The same 16 plus total IgE	about 5 days	£226
Allergy Profile II	20 allergens of your choice	about 5 days	£248
ALEX3	About 300 allergens and components, plus total IgE	about 7 days	£331
Allergy Profile III	40 allergens of your choice	about 5 days	£433

Can't get to a clinic?
Order our allergy test kit and have your blood taken at one of 150+ partner clinics and pharmacies across the UK.

Allergy or intolerance?
These tests look for an allergic (IgE) response. They don't test for food intolerances. A positive result shows sensitisation, not always a true allergy, so it's best read alongside your symptoms. A GP consultation can help.

Common questions

Do I need to stop antihistamines?

No. Unlike skin-prick tests, blood tests for IgE aren't affected by antihistamines, so keep taking your usual medicines.

Do I need to fast?

No. You can eat and drink as normal before an allergy blood test.

How long do results take?

About 5 days for most allergy tests (ALEX3 about 7 days), in your secure online account.

How do I choose my own allergens?

For Allergy Profiles I, II and III you pick the allergens. Call 020 3633 2371 or WhatsApp us and we'll help you choose before your appointment.

Can my child be tested?

Yes, at our Slough or Neasden clinic. Please call 020 3633 2371 before booking a child's appointment.

What if I have a severe reaction?

A blood test can't treat or rule out a dangerous reaction. If you have swelling of the lips or throat, or difficulty breathing, call 999 straight away.