Impact Factor & Key Scientometrics


Impact Factor


H Index


Impact Factor


I. Basic Journal Info


United States
Journal ISSN: 01434179, 15322785
Publisher: Churchill Livingstone
History: 1980-ongoing
Journal Hompage: Link
How to Get Published:

Research Categories


The aim of Neuropeptides is the rapid publication of original research and review articles, dealing with the structure, distribution, actions and functions of peptides in the central and peripheral nervous systems. The explosion of research activity in this field has led to the idenfication of numerous naturally occurring endogenous peptides which act as neurotransmitters, neuromodulators, or trophic factors, to mediate nervous system functions. Increasing numbers of non-peptide ligands of neuropeptide receptors have been developed, which act as agonists or antagonists in peptidergic systems.

II. Science Citation Report (SCR)

SCR Impact Factor

SCR Journal Ranking

SCImago SJR Rank

SCImago Journal Rank (SJR indicator) is a measure of scientific influence of scholarly journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from.


Scopus 2-Year Impact Factor Trend

Note: impact factor data for reference only

Scopus 3-Year Impact Factor Trend

Note: impact factor data for reference only

Scopus 4-Year Impact Factor Trend

Note: impact factor data for reference only

Impact Factor History

2-year 3-year 4-year
  • 2022 Impact Factor
    3.025 3.159 3.205
  • 2021 Impact Factor
    3.048 3.187 2.941
  • 2020 Impact Factor
    2.969 2.707 2.876
  • 2019 Impact Factor
    2.476 2.611 2.819
  • 2018 Impact Factor
    2.519 2.647 2.563
  • 2017 Impact Factor
    3.133 2.926 3.02
  • 2016 Impact Factor
    2.306 2.714 2.962
  • 2015 Impact Factor
    2.826 3.131 2.85
  • 2014 Impact Factor
    2.914 NA NA
  • 2013 Impact Factor
    2.837 NA NA
  • 2012 Impact Factor
    2.264 NA NA
  • 2011 Impact Factor
    1.754 NA NA
  • 2010 Impact Factor
    1.868 NA NA
  • 2009 Impact Factor
    2.183 NA NA
  • 2008 Impact Factor
    2.582 NA NA
  • 2007 Impact Factor
    2.661 NA NA
  • 2006 Impact Factor
    3.274 NA NA
  • 2005 Impact Factor
    2.273 NA NA
  • 2004 Impact Factor
    2.565 NA NA
  • 2003 Impact Factor
    2.314 NA NA
  • 2002 Impact Factor
    1.632 NA NA
  • 2001 Impact Factor
    2.008 NA NA
  • 2000 Impact Factor
    1.458 NA NA
Note: impact factor data for reference only




Impact Factor

Impact factor (IF) is a scientometric factor based on the yearly average number of citations on articles published by a particular journal in the last two years. A journal impact factor is frequently used as a proxy for the relative importance of a journal within its field. Find out more: What is a good impact factor?

III. Other Science Influence Indicators

Any impact factor or scientometric indicator alone will not give you the full picture of a science journal. There are also other factors such as H-Index, Self-Citation Ratio, SJR, SNIP, etc. Researchers may also consider the practical aspect of a journal such as publication fees, acceptance rate, review speed. (Learn More)


The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications


H-Index History