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2.4 What kinds of tablets are there?




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This article is from the Asthma FAQ, by Patricia Wrean and Marie Goldenberg mwg@radix.net with numerous contributions by others.

2.4 What kinds of tablets are there?


CR - controlled release. This means that the drug has a
constant rate of release.
DR - delayed release. This generally refers to enteric-
coated tablets which are designed to release the drug
in the intestine where the pH is in the alkaline range.
ER - extended release. Dosage forms which are designed to
release the drug over an extended period of time, such
as implants which release the drug over a period of
months or years.
SA - sustained action. Used interchangeably with CR
(above), except that SA usually refers to the
pharmacologic action while CR refers to the drug
release process.
TD - time delayed. This is slightly different from DR in
that the drug release is designed to occur after a
certain period of time, such as pellets coated to a
certain thickness, multi-layered tablets, tablets
within a capsule, or double-compressed tablets.

Contributed by: Susan Graham sgraham@hpb.hwc.ca

 

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