Hay fever season arriving early this year

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High pollen concentrations in February

A sharp increase in concentrations of alder and hazelnut pollen in particular was measured in February, following a week with relatively high temperatures. This immediately led to increased sales of hay fever medication, which lasted for several weeks. Sales dropped again at the beginning of March, when pollen concentrations in the air had decreased significantly.

Turnover of hay fever medication

The hay fever index - the turnover index of hay fever medication - is based on weekly sales figures obtained from Dutch pharmacies. This involves self-medication products which are available without prescription at a pharmacy. This type of medication is in the form of tablets, nasal sprays or eye drops which relieve allergic reactions. These weekly data have been processed by the CBS Centre for Big Data Statistics (CBDS) into a weekly turnover index of hay fever medication. The turnover index is not designed to provide the total sales volume of hay fever medication in the Netherlands, but to give more insight into the development of the hay fever season and the purchasing moments of consumers, based on developments in weekly sales.