per protocol clinical cure rate compared to
Biaxin(R) in CAP (cethromycin 91.5% (205/224) compared to Biaxin(R)
95.9% (212/221) [-9.1, +0.3], p=0.0775). Cethromycin's achievement
of a 91.5% clinical cure rate is consistent with its Phase 2
clinical trial results at the same 300 mg once-daily dose for CAP.
The comparator drug, Biaxin(R), achieved a cure rate higher than
the historical rate observed in any reported Biaxin(R) CAP clinical
trials to date.
Cethromycin also achieved positive safety results in the study.
Cethromycin demonstrated an improved safety profile when compared
with the results seen in its previous clinical trials.
Additionally, the incidence of adverse events was not statistically
different between cethromycin and Biaxin(R). The most common
adverse events reported in patients receiving cethromycin were
mild-to-moderate diarrhea (cethromycin 5.0%, Biaxin(R) 4.6%),
headache (cethromycin 3.1%, Biaxin(R) 6.5%), nausea (cethromycin
2.7%, Biaxin(R) 3.8%), vomiting (cethromycin 2.7%, Biaxin(R) 1.5%),
abdominal pain (cethromycin 1.5%, Biaxin(R) 3.1%) and taste
disturbance (cethromycin 11.1%, Biaxin(R) 6.2%). No drug-related
serious adverse events were observed in any study subject. Liver
function tests and electrocardiogram monitoring demonstrated no
significant differences between subjects receiving cethromycin and
subjects receiving Biaxin(R), consistent with the hepatic and
cardiac side effect profile reported in cethromycin's previous
clinical trials.
Cethromycin is not approved as a treatment for CAP, and data
from this analysis have not been reviewed by the FDA. No further
details of the clinical study will be available until all data
analyses are complete and results are presented in a public,
scientific forum.
Program Design
The Phase 3 CAP clinical trial program is comprised of two
randomized, well controlled, double-blind, multi-center,
multi-national, comparator trials designed to assess the safety and
effectiveness
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