[Adverse events of biologic therapies]

Biological therapies have revolutionized the management and the outcome of patients with inflammatory rheumatic diseases. The prescription and the number of patients under biotherapies have greatly increased. Unfortunately, these treatments are occasionally accompanied by side effects usually reversible upon treatment discontinuation. Some are preventable or can be reduced, including through the screening and prevention (tuberculosis screening, vaccination…). It is important to be aware of these different side effects to adapt the prescription of biologics according to the patient's profile (history of infection, malignancy, heart failure…). It is also critical to involve the patients into the decision-making and thus, to inform them thoroughly.