Using your phone's internet browser
go to:  qna.rediff.com
Click and drag this link to
the Home icon in your browser.
Q.

Difference between cr and sr

Tags: money, careers, politics & government
Asked by Namdeo Jadhav, 26 Feb 10:49 am
  Invite a friend  |  
  Save  |  
 Earn 10 points for answering
Answer this question  Earn 10 points for answering    
4000 characters remaining  
  
    
Keep me signed inNew User? Sign up

Answers (3)

1.

Time Release Technology also known as Sustained-release (SR), extended-release (ER, XR, or XL), time-release or timed-release, controlled-release (CR), or continuous-release (CR or Contin) pills are tablets or capsules formulated to dissolve slowly and release a drug over time. The advantages of sustained-release tablets or capsules are that they can often be taken less frequently than instant-release formulations of the same drug, and that they keep steadier levels of the drug in the bloodstream.
Answered by anil garg, 27 Feb 01:10 pm

 
  
Report abuse
Useful
 (0)
Not Useful
 (0)
Your vote on this answer has already been received
2.

You're correct- XR literally means "extended release", while CR literally means "controlled release".',

That said, there is no inherent, objective or absolute definition of what these terms mean when used to describe drug products. About the only thing you can be certain of is that the release rate over time is more of an even keel than the regular / instant-release version.

Like an out-of-tune piano that's still in tune with itself, drugs tend to use those terms accurately within the sub-universe of their own existence. Outside of that, it's anybody's guess. Drug X's "ER" version could be parallel to Drug Y's "CR" version, whereas the "SR" version of Drug Z is closer still. A lot of it is gimmicky marketing, with just enough bioequivalence difference to pass legal muster.
Answered by Mickey, 26 Feb 02:00 pm

 
  
Report abuse
Useful
 (0)
Not Useful
 (0)
Your vote on this answer has already been received
3.

Time Release Technology also known as Sustained-release (SR), extended-release (ER, XR, or XL), time-release or timed-release, controlled-release (CR), or continuous-release (CR or Contin) pills are tablets or capsules formulated to dissolve slowly and release a drug over time. The advantages of sustained-release tablets or capsules are that they can often be taken less frequently than instant-release formulations of the same drug, and that they keep steadier levels of the drug in the bloodstream. The first Sustained release tablets were made by Howard Press, in Hoboken, NJ in the early 50's and the
first tablets relased under his process patent were called "Nitroglyn" and made under license by Key Corp., in Florida. Today most are formulated so that the active ingredient is embedded in a matrix of insoluble substance (various: some acrylics, even chitin, these are often patented) so that the dissolving drug has to find its way out through the holes in the matrix. In some SR formula ...more
Answered by vedprakash sharma, 26 Feb 10:58 am

 
  
Report abuse
Useful
 (0)
Not Useful
 (0)
Your vote on this answer has already been received

Ask a Question

Get answers from the community

600 characters remaining

Related Answer

Q.
A

19th centuryCONSORTIUM NEWS - In the late 19th Century, Samuel Bush moved to Ohio from Orange, New Jersey, where he had attended the nearby Stevens In..more

Answered by prathiksha