Is throbbing in the cheeks while taking Izotek a cause for concern?

It is difficult to clearly determine the causes of the described symptom on the basis of such a short description. I encourage you to make an appointment with a dermatologist who will adjust the treatment according to your current clinical condition. Dose adjustment may be necessary. I also encourage you to report an adverse reaction if you have not already done so: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane As a preliminary procedure, it is worth intensifying skin care - use intensively moisturizing and oiling preparations, additionally protecting the skin against weather conditions (cold, wind, sun), e.g. Cetaphil PS (the more that it is winter and there are radiators = drying of air and skin): https://www.gdziepolek.pl/produkty/16829/cetaphil-ps-lipoaktywny-krem-nawilzajacy-krem/apteki In addition, you can include oral tablets that seal capillaries, e.g.: Venoruton Forte: https://www.gdziepolek.pl/produkty/81807/venoruton-forte-tabletki/apteki Rutinoscorbin: https://www.gdziepolek.pl/produkty/68342/rutinoscorbin-tabletki-powlekane/apteki The above drugs are over-the-counter and do not interfere with Izotek. The action and composition of individual drugs can be checked by clicking on the attached links on the gdziepolek.pl website, which also allows you to book them at the nearest pharmacy. If you are unable to get to your primary care doctor, the gdziepolek.pl service also allows you to obtain a teleconsultation with a doctor: https://www.gdziepolek.pl/telekonsultacja