If you accidentally use more Levrix you should talk to your doctor. As with any medicine, in the event of an overdose, you should contact your nearest hospital emergency department or Poisonous Information Centre for advice, at 0800 764766, even if there are no signs of discomfort or poisoning. You may need urgent medical attention. Keep telephone numbers for these places handy. If you are not sure what to do, contact your doctor or pharmacist.