Medication: Allergen specific immunotherapy
What is it and how does it work?
It’s a solution containing a tiny amount of selected allergens. The intention of this treatment is to desensitise the immune system to the allergens in the solution so that when they are encountered in day-to-day life, no allergic reaction results.
How is it given?
Injection given every few weeks to start with, then every month.
How long does it take to have effect?
Speed of action is very slow and it can take 9 – 12 months to see an improvement.
What is the cost?
Initially fxpensive, for example a vial for one year could cost approximately £250-£300.
Are there any side effects?
Side effects are very rare but a few side effects are reported to transiently occur after the injection is given, including itchiness, sleepiness, vomiting/ diarrhoea.