PD 'Nil by Mouth' Medication Dose Calculator

This medication calculator is for use by doctors, nurses and pharmacists who are looking after patients with Parkinson's who have been admitted to hospital and are unable to take their medications orally.

Last reviewed
  • Inpatient care and medicines management
Resource type
  • Tools
  • Doctor (Geriatrician)
  • Doctor (Neurologist)
  • Doctor (Other)
  • Nurse (other)
  • Nurse (Parkinson's nurse)
  • Pharmacist

The tool is designed to convert a patient's usual Parkinson's medications to a 'Levodopa equivalent dose' (LED) for patients unable to take their usual medications orally. The LED can be used to calculate dispersible madopar doses for nasogastric tubes.

The LED can then be used to calculate what dose of dispersible madopar should be given via a nasogastric tube to provide a patient with their usual amount of PD medication.

The tool also provides a conversion to a rotigotine patch dose. 

The PD 'Nil by Mouth' Calculator was developed by the Northumbria Healthcare NHS Foundation Trust Parkinson's Disease team in 2014 (Richard Walker, Brian Wood, Annette Hand and James Fisher), who worked in collaboration with Daniel Jamieson (PhD student at Newcastle University's School of Computing Science).

This tool is no substitute for clinical reasoning nor should it be used as a substitute for expert advice.