Kenalog Injection

Kenalog injection for use in seasonal allergic rhinitis and other seasonal allergic conditions

This page is informational and is not designed to promote or advertise any medication. We provide this information in an unbiased fashion to educate and inform our readers. All prescription medications have side-effects and therefore a consultation with a heath professional is a mandatory part of the process, before being prescribed ANY medication.


The MHRA is the regulatory authority that determines how information about medications can be presented to the public. We would like to make it clear that we are only providing this information so that patients can understand how this particular medication works.


This informational page does not constitute an advertisement or solicitation to promote this medication. As a healthcare clinic, we do not promote the usage of any medication without a thorough medical consultation and examination with an appropriate healthcare professional.

Do you suffer from severe hay fever ?

Kenalog injections provide relief from severe allergy symptoms, including sneezing, itching, and congestion. They offer long-lasting relief, reducing the need for daily medication. Kenalog injections work by suppressing the immune response to allergens, providing effective symptom control for hay fever sufferers

If you suffer from hay fever and are getting only partial relief from tablets, nasal sprays and eye drops, then you could be classed as having severe hay fever. We advise most of our patients to try and take a few different forms of anti-histamine medications, but if these do not help then the Kenalog injection may be a solution.

Please note the Kenalog injection is not always the most appropriate treatment for your concerns and this will all be discussed at the consultation stage. Each injection contains triamcinolone  acetonide 40 mg/ml, which is a prescription drug.

Hay fever is surprisingly common with around 10% -20% of the population suffering. What is particularly frustrating is as the weather starts to warm up and the sun comes out, so pollen count starts to rise. As it rises, so do the symptoms of those suffering from hay fever.


Grass pollen: high pollen count during May to July

Tree pollen: high pollen count during February to June

Weed pollen: high pollen count during June to September


Symptoms range from runny nose, itchy eyes and sneezing to sickness and exhaustion in more severe cases. 


Hay fever is caused by your immune system over reacting to an allergen.  In this case the allergen is pollen. Your body reacts to the pollen as a foreign body and wants to remove it, although it is in fact harmless.

Tablets / Eye drops / Nasal Spray

Anti histamine Tablets, eye drops and nasal spray offer most people relief from their symptoms. 


Anti histamines

If you’re buying medications over the counter there are few things that you should make note . Tablets that contain Loratadine and Cetirizine are non-drowsy antihistamines great for tackling symptoms during the day.


Antihistamines that contain Chlorpheniramine and Diphenhydramine are drowsy, which are good to use if you need a good night’s sleep without sneezing.


Nasal Sprays

Be patient with nasal sprays, for them to take their full effect you will need to use it regularly over a period of time. They work particularly well if you suffer from nose congestion during the season. 


Eye drops

Itchy or dry eyes can quickly be solved with eye drops. 

How does the Kenalog injection work ?

The Kenalog injection should be considered as a secondary stage of treatment for patients who have already tried other forms of medication. 


The injection works by reducing the production of histamine.  The injection does not cure allergic symptoms,  but it temporarily suppresses the immune system enough to take away the symptoms. Patients are injected in the buttock muscle and it only takes a few seconds.  Whilst thie injection reduces the response to common allergens, it can also theoretically reduce the body's response to fight normal bacterial and viral infections too.  This can be discussed at your appointment.


One injection is normally enough to last for a whole hay fever season. Sometimes two injections are needed within a few weeks of each other. It is not suitable for children under the age of 12.

How quickly does it work ?

Most patients get relief within 48 hours, with all patients finding they get symptomatic relief within 72 hours.

  • When the steroids are injected instead of taken orally they are deposited directly into the muscle. There, they leak into the bloodstream in a low dose over the course of around three weeks.
  • The injection contains 40mg of the steroid triamcinolone. Each injection is approximately equal to a steroid dose from taking a 5mg tablet of prednisolone every day for around three weeks.
  • One of the benefits of the injection is that it does not have to go through the liver or the digestive system, so can be administer at a slightly lower dose than you would take in tablet form.
  • The injections have helped many people to control hay fever symptoms.