Sometimes, blood pressure can drop during the treatment. Those who take medications to lower their blood pressure may have to hold blood pressure medications before the infusions. This would need to be discussed with your doctor.
Mild side effects during or up to 24 hours after receiving rituximab may occur. These usually occur with the first infusion, and can include mild throat tightening, flu-like symptoms, rash, itchiness, dizziness, back pain, nausea, upset stomach, sweating, nervousness, muscle stiffness, and numbness. These symptoms can be reduced by receiving a steroid injection before the infusion, along with acetaminophen (Tylenol) and diphenhydramine (Benadryl). The infusion is sometimes stopped for a short while and then restarted at a slower rate if the symptoms get better. Rarely, patients will have more serious symptoms, such as wheezing, mouth or throat swelling, trouble breathing, or chest pain. Patients who experience these symptoms should tell their health care providers immediately; patients may receive stronger medications to treat those symptoms.
In the months after the treatment, some people may notice more frequent infections, such as colds or sinusitis. Usually, these are not severe. There are a few rare but serious side effects from rituximab. Patients who experience vision changes, loss of balance, difficulty walking, confusion, skin reactions, or mouth sores should contact their doctors immediately.
Combining treatment with other biologic drugs, which suppress the immune system, including etanercept (Enbrel), adalimumab (Humira), infliximab (Remicade), certolizumab (Cimzia), golimumab (Simponi), abatacept (Orencia), and tocilizumab (Actemra) may increase the risk of serious infections and is contra-indicated.