vol1 - Page 365
Page 365
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the patient's lifetime. _ Nonetheless__
DEA insists that
retention of visual function, the Agency's nnew# standards is
viable. DEA explains:
When new glaucoma treatments are tested for
[an NDA determination of] efficacy0 they are
evaluated for their ability to sufficiently
lower intraocular pressures an4____9_.___D__i_
visual field_. To properly measure the
treatmentSs effect on both_ it must be use@
in long?term testing. _T_molcl _ _ . has been
tested in this manner. 166/ (_mphasis added)°
Aside from a handful of statements by DEA witness
Green, there is no evidence to suggest timolol'soNDA approval was
based on any scientificdemonstration timolol _retained visual
field° #-16[/ DEA seeks to support its position by citing
testimony from Alliance witness_ Dr° Jo_ Merritt. In the
testimony DEA references, however, Dro Merritt makes precisely
the opposite point.
It]he statement that Timolol alters the
visual fields in a positive sense has
definitely not been shown in _e published
data to date .... [FDA_ only looked at
pressure ffects [in its NDA review
of timolol]. _-_'
i-_/ DEA Brieft _ 70_ at 42 (emphasis added).
I_// Cross-examination of Keith Greene Ph.D. Tr. 9_74 & 9-75.
Green testifies he thinks visual field analysis was critical to
the NDA approval of timolol, an IOP lowering agent_ Signifi-
cantly, Green later prefaces his testimony on timolol by noting
he is recollecting _to the best of my knowledge, u /__. at Tr. 9 -
74 & 9-75_ Tr. 9_178. The limits to GreenSs knowledge are
quickly reached when he cannot identify a single timolol study
which demonstrates his claim timoloi _retains visual function, n
_. at Tr. 9-75° _ alsq ACT Brief at 176-178o
ii_/ Cross-examination of Dr. John Merritt at Tr° 10-187 & i0 _
188. Dr. Merritt also addressed this point on cross-examination
by DEA at Tr. I0-231_ #Timolol [approval] was based onlyoon
[evidence of the drug's] pressure lowering effect only. _
59 -
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