eRAPID is an online system for patients to self-report symptoms and side effects (known as adverse events or AE) during and after cancer treatments. eRAPID allows AE reporting from home or hospital and enables patient reported data to be integrated into existing Electronic Patient Records (EPR) to allow for the reports to be used in routine care. In addition the system is capable of generating alerts for severe AE to the relevant clinical team and providing patient advice on managing mild and moderate AE.