7 Nov 2011
The first answer was correct:
IR = Instant release. Drug will take effect from 5-30 minutes after ingestion and it will stay effective for 2-6 hours.
ER/SR = Extended or Sustained Release. Drug will take effect from 15-60 minutes after ingestion and it will stay effective for anywhere from 4-12 hours from ingestion.
Breaking/cutting/crushing an IR tablet can make it take effect faster, but possibly shorten (slightly) how long it is effective.
One should NEVER break/cut/crush an SR tablet as they will get a MUCH higher dose than is on the label. It WILL take effect faster, however it will NOT last nearly as long.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
1 answer • 7 Aug 2009
1 answer • 30 Jun 2010
morphine sulphate 15mg
2 answers • 15 Feb 2012
If you are changing meds from morphine sulphate to another pain med , how long will it take for the morphine to leave your system ?
1 answer • 12 Nov 2012
... among other meds, and I have stayed on the same regimen for the last few years, which has worked pretty well for me. Well, now they are weaning ...
2 answers • 28 Jun 2013