In his clinical opinion, the inpatient use of a haloperidol p.r.n.
regimen often is unsound and unsafe.
The hypnosis group used hypnosis as primary treatment for nausea and vomiting, using antiemetic medication on a supplemental (p.r.n.
) basis only, whereas the control group received a standardized antiemetic medication regimen.
One US study has suggested that the number of medications administered to a resident is about half of the medications prescribed , reflecting the high frequency of prescription on an `as needed' [pro re nata (p.r.n.
)] or discretionary basis.
Once satisfactory analgesia is achieved, patients generally require less analgesia than when it is administered by P.R.N.
"Awakening during the night with difficulty falling back to sleep is a prevalent condition, and a p.r.n.
treatment for this is needed as it may decrease overall drug exposure," said the study's coinvestigator, Thomas Roth, Ph.D., of Henry Ford Hospital, Detroit.