ketek (telithromycin) regulatory history
DESCRIPTION
Ketek (telithromycin) Regulatory History. Janice Soreth, M.D. Director Division of Anti-Infective & Ophthalmology Products CDER/FDA. Ketek Regulatory History: Outline. US Submissions: 1998-2004 3 Review Cycles Two Advisory Committees: April, 2001; January, 2003 - PowerPoint PPT PresentationTRANSCRIPT
Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
KetekKetek (telithromycin) (telithromycin) Regulatory History Regulatory History
Janice Soreth, M.D.Director
Division of Anti-Infective & Ophthalmology ProductsCDER/FDA
2Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:OutlineOutline
• US Submissions: 1998-2004– 3 Review Cycles
• Two Advisory Committees:– April, 2001; January, 2003
• Division of Scientific Investigation Reports• Efficacy & Safety Data
3Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History: Ketek Regulatory History: First Cycle 1998-2001First Cycle 1998-2001
• 1998: clinical trials for phase 3 program discussed with FDA community-acquired pneumonia, acute bacterial
sinusitis, acute exacerbation of chronic bronchitis, tonsillopharyngitis
• FDA advice to sponsor on specific trial design based upon then current (1998) updated guidance
• 2000: NDA 21-144 filed• 2001: Advisory Committee held
4Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History: Ketek Regulatory History: First CycleFirst Cycle
At April 2001 Advisory Committee, four indications were discussed:
– community-acquired pneumonia*– acute exacerbations of chronic bronchitis*– acute sinusitis*– tonsillopharyngitis
* including penicillin- and erythromycin-resistant Streptococcus pneumoniae
5Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History: Ketek Regulatory History: First CycleFirst Cycle
April 2001 Advisory: Phase III Clinical Database by Type of Study and Indication
3 Controlled3 Uncontrolled
CAP
2 Controlled
AECB
2 Controlled1 Uncontrolled
ABS
2 Controlled
G ABHS T/P
1 3 P h a se III C lin ica l S tu d ies
6Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History: Ketek Regulatory History: First CycleFirst Cycle
Controlled (9 tria ls)2045 Ketek
1672 Com parator
Uncontrolled (4 trials)1220 Ketek
Post-baseline safety follow -up4937 pts (Ketek + com parator)
3265 Ketek1672 Com parator
Random ized/treated4985 pts (Ketek + com parator)
Phase 3 Safety Data
7Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek- April 2001 Advisory Ketek- April 2001 Advisory Committee MeetingCommittee Meeting
• Focus on safety data• FDA’s efficacy analyses consistent with
those of the sponsor for pneumonia, AECB, and acute bacterial sinusitis
• Study in tonsillitis/pharyngitis did not meet pre-specified endpoint
• Advisory Committee in 2001 did not take issue with efficacy data derived from non-inferiority trials
8Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek - April 2001 Advisory Ketek - April 2001 Advisory Committee MeetingCommittee Meeting
Chief safety concerns:
• Cardiac• Hepatic• Visual
9Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek- April 2001 Ketek- April 2001 Advisory Committee VoteAdvisory Committee Vote
• Do the efficacy and safety data presented support the use of Ketek in – community-acquired pneumonia 7 yes 3
no– AECB 0 yes 10
no– acute bacterial sinusitis 2 yes 8 no
• Are the data sufficient for a claim of pneumonia due to pen-resistant S. pneumoniae? 3 yes 7 no
10Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek - April 2001 Ketek - April 2001 Advisory Committee VoteAdvisory Committee Vote
Recommendations for additional Ketek studies:• Safety
– Larger number of patients need to be studied to determine safety
– Special populations should be targeted (elderly, patients with hepatic impairment, renal impairment); more PK
– Drug interactions should be evaluated• Efficacy
– More data requested in patients with drug-resistant S. pneumoniae (including bacteremia), H. influenzae
11Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History: Ketek Regulatory History: First Cycle First Cycle
Approvable Letter June 2001 Approvable Letter June 2001
• Ketek approvable for pneumonia, bronchitis, and sinusitis.
• Additional safety and efficacy data requested to assess risks/benefits– large safety trial in respiratory tract
infections– PK studies, special populations– additional experience with drug-resistant S.
pneumoniae, H. influenzae, bacteremia
12Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Second CycleSecond Cycle
• July 24, 2002- resubmission included Study 3014 (24,000 patients, 1800 investigators), data from additional efficacy studies (CAP, AECB), PK studies, and some postmarketing data
• January 8, 2003: second Advisory meeting
13Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Second CycleSecond Cycle
January 8, 2003 AdvisoryJanuary 8, 2003 Advisory
• Additional efficacy and safety data discussed: focus on study 3014, in addition to PK studies and community-acquired pneumonia targeting resistant S. pneumoniae
• Advisory Committee judged that safety and efficacy for the 3 requested indications had been demonstrated, in large measure on the safety data in study 3014
• DSI report of January 21, 2003: 3 clinical sites in study 3014 inspected; concerns raised about data integrity.
14Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Second Cycle Second Cycle
Approvable Letter Jan 23, 2003Approvable Letter Jan 23, 2003
• Safety could not be fully assessed– questions of data integrity raised by the
conduct of study 3014– incomplete postmarketing safety data
submitted from foreign marketing experience
• Requested additional information – on auditing, monitoring, and irregularities or
violations of Good Clinical Practices in order to further evaluate data integrity in study 3014
– complete reports (original and follow-up) and analyses of foreign postmarketing safety information
15Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Third CycleThird Cycle
CDER Regulatory Briefing February 19, 2003CDER Regulatory Briefing February 19, 2003
• “Issues of data integrity with Study 3014 are of concern and should be resolved before an approval action (if warranted) can be taken.
• Additional sites should be identified for future DSI inspections.
• If data provided by study 3014 cannot be used to support safety of Ketek, the Division might be able to rely on post-marketing data from those countries where Ketek has already been approved.”
16Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Third CycleThird Cycle
March 6, 2003 Closed Advisory MeetingMarch 6, 2003 Closed Advisory Meeting
• Closed AC meeting held to update the Anti-infective Advisory Committee on other development programs in the division.
• Committee was apprised of data integrity issues concerning study 3014 that precluded approval action.
17Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Third CycleThird Cycle
• October 2003: Sponsor submitted analyses of foreign postmarketing data.
• Additional DSI inspections requested to provide an overall assessment of data integrity in study 3014.
• March 2004 DSI findings: Monitoring of study sites by sponsor failed to detect problems found by FDA inspections. Hence, integrity of data from all 1800 sites could not be assured with any degree of confidence.
18Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Third CycleThird Cycle
Clinical Review Summary• Safety information included post-marketing adverse
event reports generated from an estimated 3.7 million uses in foreign countries (2.2 million in France and Germany).
• All available safety data led to conclusion that Ketek appeared similar to other antibiotics in terms of hepatic and cardiac toxicity. Life-threatening exacerbation of myasthenia gravis noted in foreign use.
• Review of all available safety data supported approval of Ketek in April, 2004.
19Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Approval April 1, 2004Approval April 1, 2004
The data that provided substantial evidence of safety and efficacy for Ketek (telithromycin) at the time approval included:
– Multiple comparative studies of community-acquired pneumonia (CAP), acute bacterial sinusitis (ABS), acute exacerbation of chronic bronchitis (AECB):
– These comparative studies were the basis for efficacy claims in CAP, ABS, and AECB. The studies also served as the basis for safety claims, providing information on the rates of adverse effects seen with Ketek compared to other antibiotics used for these indications.
20Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Approval April 1, 2004 (continued)Approval April 1, 2004 (continued)
– Non-comparative studies of CAP with Ketek: In addition to the comparative CAP studies, these studies of CAP provided additional data on outcomes in patients with CAP due to multi-drug resistant Streptococcus pneumoniae.
– These non-comparative studies also provide safety data on the use of Ketek in the treatment of CAP.
21Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Approval April 1, 2004 (continued)Approval April 1, 2004 (continued)
– Phase 1 Visual study: This study of high-doses of telithromycin was performed to study the mechanism of the visual effects of Ketek.
– Multiple other phase 1 studies evaluating the pharmacokinetics of Ketek. These studies included food effect studies, drug interaction studies, QT prolongation, and studies of the pharmacokinetics of Ketek in patients with renal or hepatic impairment.
22Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
Ketek Regulatory History:Ketek Regulatory History:Approval April 1, 2004 (continued)Approval April 1, 2004 (continued)
Foreign post-marketing data in 3.7 million exposures were evaluated as part of the assessment of safety to identify uncommon serious adverse effects of Ketek (hepatic, visual, cardiac) based upon post-marketing reports from France, Germany, other European countries, and Latin America where Ketek was already approved.
23Joint Meeting of Anti-Infective Drugs &Joint Meeting of Anti-Infective Drugs &Drug Safety and Risk Management Advisory CommitteesDrug Safety and Risk Management Advisory CommitteesDecember 14-15, 2006December 14-15, 2006
ReturnReturn
Return to agenda