5 doctors weighed in:

Kindly explain me the difference between sustained release & extended release in drugs?

5 doctors weighed in
Dr. Robbin Lee
Pharmacology
1 doctor agrees

In brief: What's In a name

The terms extended release and sustained release are generalizations and are virtually interchangable.
Er, sr, xr, cr, xl are all suffixes attached to drug names to indicate that the medication is delivered over a period of time (usually 12 to 24 hours) instead of being immediately available to your body. This is achieved in various ways. Naming is just a preference of the manufacturer.

In brief: What's In a name

The terms extended release and sustained release are generalizations and are virtually interchangable.
Er, sr, xr, cr, xl are all suffixes attached to drug names to indicate that the medication is delivered over a period of time (usually 12 to 24 hours) instead of being immediately available to your body. This is achieved in various ways. Naming is just a preference of the manufacturer.
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1 comment
Dr. Heidi Fowler
For wellbutrin the XL (extended) acts longer than the SR (slow release).
Dr. Dan Fisher
Internal Medicine
1 doctor agrees

In brief: Same thing.

Different name for same thing.
Different manufacturers use different terms. There are many synopnyms: sustained-release (sr), sustained-action (sa), extended-release (er, xr, xl), timed-release (tr), controlled-release (cr), modified release (mr), or continuous-release (contin).

In brief: Same thing.

Different name for same thing.
Different manufacturers use different terms. There are many synopnyms: sustained-release (sr), sustained-action (sa), extended-release (er, xr, xl), timed-release (tr), controlled-release (cr), modified release (mr), or continuous-release (contin).
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Dr. Alvin Lin
Internal Medicine - Geriatrics

In brief: Same thing

Those are just marketing terms to indicate a medication that only needs to be taken once or twice a day rather than 3 to 4 times daily.
Some brands will use "xl" or "la" to denote longer acting drugs. If there's any concern, ask your doctor or pharmacist about your specific situation & medications.

In brief: Same thing

Those are just marketing terms to indicate a medication that only needs to be taken once or twice a day rather than 3 to 4 times daily.
Some brands will use "xl" or "la" to denote longer acting drugs. If there's any concern, ask your doctor or pharmacist about your specific situation & medications.
Thank
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