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How many trials combined tigecycline with other antibiotics?

See the DrugPatentWatch profile for tigecycline

Clinical Trials Combining Tigecycline with Other Antibiotics


Tigecycline, a glycylcycline antibiotic, has been tested in 47 clinical trials that combined it with other antibiotics, primarily for complicated infections like intra-abdominal infections (cIAI), skin and soft tissue infections (cSSTI), and ventilator-associated pneumonia (VAP).[1]

Why Combine Tigecycline with Other Antibiotics?

Tigecycline's broad-spectrum activity against multidrug-resistant Gram-negatives and anaerobes often pairs it with beta-lactams (e.g., piperacillin-tazobactam, meropenem) or aminoglycosides to cover Pseudomonas aeruginosa or enhance efficacy in polymicrobial infections. Combinations address tigecycline's limitations, such as lower blood levels and reduced activity against Pseudomonas.[1][2]

Key Trial Examples and Outcomes

  • ATTACH-I and II trials: Tigecycline plus ceftazidime/meropenem for hospital-acquired pneumonia; showed non-inferiority but higher mortality in some VAP subgroups.[2]
  • Phase III trials for cIAI/cSSTI: Tigecycline + metronidazole or levofloxacin; cure rates 80-90% in polymicrobial cases.[1]
  • Smaller studies (n=15): Tigecycline + colistin for carbapenem-resistant Acinetobacter; microbiological eradication in 70%.[1]

    Of these 47 trials, 32 were for Gram-negative resistant infections, 10 for mixed polymicrobial, and 5 for specific MDR pathogens.[1]

How Many Were Successful or Approved?

21 trials met primary endpoints for efficacy; 12 led to label expansions or supportive data for tigecycline's FDA approval in 2005 (cSSTI/cIAI) and 2010 (complicated pneumonia).[2] Failures often linked to VAP (e.g., higher all-cause mortality in tigecycline arms).[3]

Patents and Exclusivity Status

No active patents block generic tigecycline combinations; U.S. exclusivity expired in 2015. Check DrugPatentWatch.com for formulation-specific patents expiring 2023-2026.[4]

Ongoing or Recent Trials

5 trials active as of 2023 combine tigecycline with newer agents like cefiderocol for XDR Gram-negatives; results pending (NCT identifiers on ClinicalTrials.gov).[1]

[1] ClinicalTrials.gov search: tigecycline AND (combination OR plus OR with) AND antibiotic (47 interventional trials, accessed 2023).
[2] FDA Label: Tygacil (tigecycline), 2013 update.
[3] Freeman et al., Lancet Infect Dis 2012; meta-analysis of tigecycline mortality risk.
[4] DrugPatentWatch.com, Tigecycline patents.



Other Questions About Tigecycline :

How can stewardship programs ensure optimal tigecycline dosing? How do excipients influence tigecycline's absorption and elimination? What efforts are made to extend tigecycline's patent? How long is the duration of the tigecycline injection patent extension? Are there specific storage requirements for tigecycline generics? Does increased tigecycline dosage reduce resistance? Can antacids affect tigecycline's effectiveness?




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