
Hay fever injection: is Kenalog safe?
Peer reviewed by Dr Colin Tidy, MRCGPLast updated by Amberley DavisLast updated 22 Jun 2025
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For 1 in 4 people, warmer weather marks the beginning of an annual struggle against hay fever. The Kenalog hay fever injection has previously offered relief to many in the UK, but the potential risks of this jab has caused the NHS to stop prescribing it. Concerns over side effects have even spurred the UK government to ban social media adverts - although some companies continue to breach this law.
We explore the safety concerns of getting the hay fever jab elsewhere.
In this article:
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What is hay fever?
Hay fever is caused by an allergic reaction to pollen. When it comes into contact with the mouth, eyes, nose or throat, the body reacts by making specific antibodies. Hay fever affects people at different times depending on which pollen they are allergic to.
The majority of people are allergic to grass pollen, so will experience their worst symptoms between May and June; tree pollen affects people in late spring between March and May; while others are affected by weed and mould pollens in the autumn.
The condition is characterised by sneezing and coughing, a runny or blocked nose, red watery eyes, itchy throat, mouth, nose, eyes or ears, headaches and sometimes a feeling of fatigue or tiredness. You may also experience a wheeze and tightness in the chest.
Many people manage hay fever symptoms by taking simple steps to stop the pollen reaching them - wraparound sunglasses to protect the eyes, or Vaseline around the nostrils - or by taking over-the-counter antihistamine drops or tablets, and using a nasal spray.
Is there an injection for hay fever?
Hay fever injections are are banned in the UK. The injection, known as Kenalog, is no longer available on the NHS, due to concerns over the risk of serious side effects. Despite this, some private clinics still administer, so it's important to understand the risks, benefits, and who it's intended for.
Chief pharmacist Stuart Gale at Oxford Online Pharmacy says: "Kenalog is only safe and recommended for use in a small number of people, as this type of steroid can make existing medical conditions worse. The mainstay of hay fever treatment is hay fever tablets - called oral antihistamines - nasal sprays and eye drops."
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How does the hay fever jab work?
For around 1 in 10 people with hay fever, home and over-the-counter medications aren't enough to relieve their symptoms. In the past, some have turned to the hay fever jab, a steroid injection marketed as Kenalog which works by suppressing the body's immune response to histamines. This in turn relieves symptoms.
Dr Farah Gilani, a Medicspot GP, says "This is an injection of a steroid called triamcinolone into a large muscle in the body. Once the steroid is injected, it slowly leaks from the muscle for 3 to 8 weeks and travels throughout the body, theoretically offering relief from hay fever symptoms."
In the UK, the NHS stopped offering Kenalog, due to concerns over possible side effects. As some people turn to private clinics, beauticians, and aestheticians for their yearly injection, it's important to be aware of the potential long-term damage this drug may cause.
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Contact dermatitis is a rash caused by your skin reacting to a substance it has come into contact with. You may need patch testing to identify the causative substance. A steroid cream or ointment will usually clear the rash. However, the long-term treatment is to avoid contact with the thing that's causing it.
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What are the risks of Kenalog?
The treatment can cause a potentially long list of side effects, including1:
Raised blood pressure
Headache.
Dizziness.
Water retention.
Skin rashes.
Muscle weakness.
Swelling.
Breathing difficulties.
Stomach pain.
Trouble sleeping (insomnia).
A change in taste.
Mental health problems - such as depression and mood swings.
Kenalog can also increase how vulnerable you are to infections, such as flu, shingles, and chickenpox.
"Once the steroid has been injected, nothing can be done to prevent it from spreading through the body over the following weeks, even if side effects are experienced," states Gilani. "In addition, it may be harmful to some people, such as those who have stomach ulcers, diabetes or an active infection."
Repeated use of steroid medications like the hay fever jab can also lead to bone loss, osteoporosis, and broken bones.
Do doctors give hay fever injections?
Kenalog is not licensed for treating hay fever in the UK. Charity Allergy UK does not endorse the injection: "The steroid injection is not recommended as it is a high-dose steroid given by an intramuscular injection and once injected, the amount of steroid cannot be removed and it comes with a high side-effect profile.
The UK government is also clamping down on advertisements for the hay fever injection. In 2022, private clinics offering Kenalog were warned that promotional social media posts would be in breach of the law.
Can I get a hay fever injection?
While some clinics offer Kenalog, they are not legally licensed to administer this injection to people with standard hay fever symptoms. This drug is permitted to treat other illnesses. Remember that it's been banned with your safety in mind.
Your best option to deal with hay fever which is not easing with standard treatments is immunotherapy. This involves injecting a small amount of pollen under the skin to help build up immunity. This usually begins in the winter, around three months before the hay fever season starts. Its aim is to desensitise the body to the allergen so it doesn't react so severely. Although it will not cure hay fever, it's effective at making symptoms much milder - and is much safer for your overall health and wellbeing.
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Further reading
Article history
The information on this page is peer reviewed by qualified clinicians.
Next review due: 19 Jun 2028
22 Jun 2025 | Latest version
12 Jun 2023 | Originally published
Authored by:
Kerry Taylor-Smith

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