Before travelling to Brussels, it is necessary to apply for the European Health Card, which allows European Union residents to receive free medical care in all Member States. In Belgium, at the end of the medical consultation, you will have to pay the doctor, and you will need an invoice to request a refund when you go back home. However, refund regulations vary according to each Member State.
Medical care and facilities in Brussels are good. The nearest hospital to the city centre is the Clinique Générale in rue Saint Jean du Marais 104 (Phone number: +32 /188.8.131.52). You can get medical advice for non-important cases in a pharmacy. They are open until 18:00h. But you will never get medicines that require a medical prescription if you do not have one. If you need to take some medicines on a regular basis, the best thing to do is bring them from your home country