Biotherapies are not without risks and side effects. Due to their mechanism of action, each molecule used has a profile of adverse effects. By blocking an element involved in immune defence, they risk exacerbating infections. Therefore, before starting a biotherapy, it is prudent to screen for the presence of latent tuberculosis so as not to reactivate it.
Indeed, tuberculosis is a disease caused by a bacterial infection, known as Mycobacterium tuberculosis. In its latent form, the bacteria can remain in the body without causing any symptoms. However, when the immune system is weakened, the body's ability to control the infection decreases, allowing the bacteria to reactivate and cause active tuberculosis.
Furthermore, it is recommended to get vaccinated against influenza and pneumococcus, as these infections can prove to be more severe and lead to serious complications in individuals whose immune system is weakened, particularly by biotherapies. Vaccination against influenza and pneumococcus thus reduces the risk of contracting these infections and can help to prevent associated complications. During the course of treatment, it is necessary to consult a doctor in case of fever to avoid the worsening of an infection.
The oral administration of biotherapy molecules is prohibited. Indeed, this leads to the destruction of the molecules in the digestive tract. Furthermore, they can easily denature, particularly under extreme temperatures. As a result, they must be stored in a cool place. In addition, biotherapy is contraindicated for pregnant and breastfeeding women, as well as in cases of allergic sensitivity. Indeed, biotherapies cross the placental barrier and may pose a risk of immunosuppression in the newborn.