Occasionally we see the information of a safety signal for medical product, but what does it really mean? We can describe the safety signal as an indication for new and significant safety-related data for a marketed product. The new data could indicate a new potentially causal association between an adverse event, beneficial response and a medical product, or a new aspect of causal association that was previously known. Usually, a signal will be relevant for all products with the same active ingredient, including the combination products. Further, let’s look more at the main steps of the safety signal management.