Guidelines for ATC classification and DDD assignment - WHOCC

J01EA Trimethoprim and derivatives
The DDDs are based on the treatment of acute urinary-tract
infections.
J01EB Short-acting sulfonamides
This group comprises sulfonamides with a biological half-life not
exceeding approx. 7 hours.
J01EC Intermediate-acting sulfonamides
This group comprises sulfonamides with a biological half-life of approx.
11-12 hours.
J01ED Long-acting sulfonamides
This group comprises sulfonamides with a biological half-life of approx.
35 hours or more.
J01EE Combinations of sulfonamides and trimethoprim, incl. derivatives
When establishing DDDs for combination products, both components
are taken into consideration, see list of DDDs for
combination products, www.whocc.no.
J01F MACROLIDES, LINCOSAMIDES AND STREPTOGRAMINS
This group comprises macrolide, lincosamide and streptogramin
antibacterials inhibiting bacterial protein synthesis through binding to
the 50-S part of the ribosomes.
J01FA Macrolides
Erythromycin ethylsuccinate tablets have been assigned a higher
DDD than other preparations of erythromycin due to a lower
bioavailability. This DDD is mainly based on the dose
recommendations.
The oral DDD for azithromycin is based on a 5-day regimen.
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