Get emergency medical help if you have signs of an allergic reaction to Ocrevus: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Some side effects may occur during the injection or up to 24 hours later. Tell your caregiver right away if you feel dizzy, tired, nauseated, light-headed, feverish, itchy, warm and tingly, or if you have a skin rash, headache, fast heartbeats, chest tightness, pain or irritation in your throat, or trouble breathing.
Call your doctor at once if you have:
fast heart beats, tiredness;
headache, nausea, dizziness;
itchy skin, rash, hives;
fever, chills, cough;
throat pain or irritation;
wheezing, breathing problem, feeling short of breath;
flushing (sudden warmth, redness, or tingly feeling);
skin sores, blisters, pus, or oozing;
cold sores or fever blisters on or around your lips;
nerve pain (tingling, burning pain, "pins and needles" feeling);
mood or behavior changes, confusion, memory problems;
weakness on one side of your body; or
problems with vision, speech, or muscle movement.
Your treatments may be delayed or permanently discontinued if you have certain side effects.
Common Ocrevus side effects may include:
skin infections;
reactions to an injection; or
cold symptoms such as stuffy nose, sneezing, sore throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Ocrevus side effects (more detail)
