Lewisham Hospital Accident & Emergency LEWISHAM HOSPITAL A&E DEPARTMENTLewisham Hospital Accident & Emergency Department Lewisham High StreetLondon, SE13 6LHMAPTHIS SERVICE IS ONLY FOR THOSE WHO NEED THE EMERGENCY HIV MEDICATION PEP. If you think you have been exposed to HIV, you can take PEP within 72 hours which could prevent transmission.