The monoclonal antibodies (mAbs) targeting calcitonin gene-related peptide (CGRP) are a valuable addition to our preventives. However, there are significant conceivable long-term adverse effects associated with them. We will have a better feel for the true risks in 10 years. For each patient, we have to decide whether the benefits outweigh the possible risks. With luck, it may come to pass that the biologics targeting CGRP carry very few long-term risks.