Rivaroxaban may cause some rare but serious side-effects. If you notice any of the following, take your child to hospital or call for an ambulance. Take the medicine packaging with you. If your child has a severe lasting headache, vomiting (being sick), dizziness, or a seizure (fit), or they are less alert than normal or have a stiff neck, they may have bleeding in the brain. If your child is weak, tired, pale, feels dizzy, has a headache, develops swelling, is short of breath or has chest pain, they may have bleeding elsewhere in the body If they have bleeding…