The use of biological drugs in the treatment of inflammatory rheumatic diseases, bowel diseases, and psoriasis has increased. Patients receiving a biological drug are invariably under the supervision of a specialized physician, but many are also attending basic healthcare clinics. Every physician taking care of a patient receiving a biological drug should be aware of the principles of interruption. In the present article we will focus on common situations, where an interruption of a biological drug must be considered in the treatment of these inflammatory diseases.