Should I stop taking Montelukast in my 4.5-year-old daughter because of a worsening runny nose that appeared the day after starting treatment?

It is not recommended to discontinue montelukast on your own without consulting a doctor. The severity of the runny nose may also result from the natural course of the infection or allergy, especially if the daughter has an enlarged third tonsil and a tendency to frequent runny noses. Montelukast rarely causes respiratory infections as a side effect. It is a drug used, m.in, in the treatment of asthma and allergies.

I encourage you not to stop treatment before you see a doctor unless your symptoms worsen rapidly or other worrying symptoms appear (e.g. difficulty breathing, high fever, etc.). A doctor's visit will allow you to assess whether the drug is suitable and whether additional treatment is necessary. In the meantime, you can use gentle methods of moisturizing the nose and keep your child hydrated.

If you need more personalized advice, you can use teleconsultations here:

https://www.gdziepolek.pl/telekonsultacja/z-padiatra

The availability of Montelukast in pharmacies in Polish can be checked at the following address:

https://www.gdziepolek.pl/produkty/50297/montelukast-sandoz-tabletki-do-ssania-gryzienia-zucia/apteki

I have attached additional information that may be helpful:

https://www.gdziepolek.pl/artykuly/czy-warto-usunac-migdalki

https://www.gdziepolek.pl/artykuly/jak-bezstresowo-podac-lek-dziecku