− Initiation of treatment in pregnancy (see section 4.6 Pregnancy and lactation). − Patients with a history of hypersensitivity to natural or recombinant interferon beta, human albumin or to any excipients. − Patients with current severe depression and/ or suicidal ideation (see section 4.4 Special warnings and special precautions for use and 4.8 Undesirable effects). − Patients with decompensated liver disease (see sections 4.4, 4.5, 4.8).