Cited by 1,763Computational Drug Discovery MethodsAnimal testing and alternativesStatistical Methods in Clinical Trials

Why 90% of clinical drug development fails and how to improve it?

Open access
Sun, Duxin, Gao, Wei, Hu, Hongxiang, Zhou, Simon·2022·Acta Pharmaceutica Sinica B

Abstract

Ninety percent of clinical drug development fails despite implementation of many successful strategies, which raised the question whether certain aspects in target validation and drug optimization are overlooked? Current drug optimization overly emphasizes potency/specificity using structure‒activity-relationship (SAR) but overlooks tissue exposure/selectivity in disease/normal tissues using structure‒tissue exposure/selectivity-relationship (STR), which may mislead the drug candidate selection and impact the balance of clinical dose/efficacy/toxicity. We propose structure‒tissue exposure/selectivity-activity relationship (STAR) to improve drug optimization, which classifies drug candidates based on drug's potency/selectivity, tissue exposure/selectivity, and required dose for balancing clinical efficacy/toxicity. Class I drugs have high specificity/potency and high tissue exposure/selectivity, which needs low dose to achieve superior clinical efficacy/safety with high success rate. Class II drugs have high specificity/potency and low tissue exposure/selectivity, which requires high dose to achieve clinical efficacy with high toxicity and needs to be cautiously evaluated. Class III drugs have relatively low (adequate) specificity/potency but high tissue exposure/selectivity, which requires low dose to achieve clinical efficacy with manageable toxicity but are often overlooked. Class IV drugs have low specificity/potency and low tissue exposure/selectivity, which achieves inadequate efficacy/safety, and should be terminated early. STAR may improve drug optimization and clinical studies for the success of clinical drug development.

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  • Less than 1% of compounds are expected to enter clinical trials, let alone reach the market.

    “Despite these investments, less than 1% of compounds are expected to enter clinical trials, let alone reach the market.13–15”

    From Drug repurposing for cancer therapy (2024) · cites this paper as [15]

    The section “Why 90% of clinical drug development fails?” says advancing a candidate to phase I is a major achievement and that roughly 90% of candidates entering clinical studies fail before approval. It does not give a rate for compounds entering clinical trials, so the specific “less than 1%” figure is unsupported by our copy. No page number is available in the indexed passages. (LLM, conf=0.85)

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  • It takes 10-15 years and costs $1-2 billion to produce a new drug approved for clinical use.

    “As such, it takes 10–15 years and costs $1–2 billion to produce a new drug approved for clinical use.”

    From Drug repurposing for cancer therapy (2024) · cites this paper as [15]

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1 of the 106 references couldn’t be matched to a known paper.

Research works printed but not linked: 5

  1. [22]Guidance for industry and review staff recommended approaches to integration of genetic toxicology study results US department of health and human services food and drug administration center for drug evaluation and research (CDER) Available from: https://wwwfdagov/media/72266/download
  2. [30]Kerns E.H. Di L. Chapter 2—advantages of good drug-like properties Di L. Kerns E.H. Drug-like properties concepts, structure design and methods from ADME to toxicity optimization 2008 Academic Press San Diego 6 16
  3. [36]Kerns E.H. Di L. Chapter 19 - pharmacokinetics Kerns EH, Di L Di L. Kerns E.H. Drug-like properties concepts, structure design and methods from ADME to toxicity optimization 2008 Academic Press San Diego 228 241
  4. [40]Wei Gao H.H. Lipeng Dai He Miao Yuan Hebao Zhang Huixia Liao Jinhui Structure‒tissue exposure/selectivity relationship (STR) may correlate with clinical efficacy/safety Acta Pharm Sin B 2022 in press
  5. [42]Zhang D. Hop C. Patilea-Vrana G. Gampa G. Seneviratne H.K. Unadkat J.D. Drug concentration asymmetry in tissues and plasma for small molecule-related therapeutic modalities Drug Metab Dispos 47 2019 1122 1135 31266753 PMC6756291

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Authors
Sun, D., Gao, W., Hu, H., & Zhou, S.
Affiliations
  • University of Michigan (US)
  • Bristol-Myers Squibb (United States) (US)
Corresponding author
Sun, Duxin
Venue
Acta Pharmaceutica Sinica B
Publisher
Elsevier BV
Published
2022-07
Volume
12
Issue
7
Pages
3049-3062
ISSN
2211-3835 (ISSN-L)
OpenAlex
W4211238337
Cited by
1,763
References
106
Citations by year
2026: 482 · 2025: 550 · 2024: 456 · 2023: 230 · 2022: 45
FWCI
27.77
Type
journal article
Language
en
Open access
Locations
  • Acta Pharmaceutica Sinica B (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Computer Science › Computational Theory and Mathematics › Computational Drug Discovery Methods
  • Health Sciences › Veterinary › Small Animals › Animal testing and alternatives
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
Keywords
medication optimization, tissue selectivity, structure-activity relationship, target validation

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