Pharmacy and chemist
Most medications are only available on prescription. You will be given the prescription by your general practitioner and can collect your medication(s) at a pharmacy (Dutch: apotheek).
Chemists (Dutch: drogist) sell medications that do not require a prescription, such as aspirin and cough medicine. There is always a pharmacy open, even in the weekend. Every pharmacy posts a notice in its window showing which pharmacy is open in the evenings and weekends.