What's the diff btw XL and XR.? And btw sustained and extended release

Sponsored Links


Sravani kompella's picture


both XL and XR mean the same and they are used for extended release.

controlled release which means drug will be released at the absoption site at a controlled rate.It  includes 

  • extended release includes again prolonged release and sustained release.
  • delayed release
  • targeted release

hence sustained release is one of the type of extended release where sustained release means drug will be released initially by a loading dose and its rate will be maintained constantly by a maintainence dose.

Extended release drugs are used to minimise the frequency of administeration of a dosage form(twofold).

http://4my4949.blogspot.in/ on april 9th 2013

keerthiyadav's picture


rx and xr are extended release and sustained release is controlled release and exended release is for prolonged period of time.


You May Also Like..