IntSide: a web server for the chemical and biological examination of drug side effects

Bioinformatics. 2015 Feb 15;31(4):612-3. doi: 10.1093/bioinformatics/btu688. Epub 2014 Oct 17.


Summary: Drug side effects are one of the main health threats worldwide, and an important obstacle in drug development. Understanding how adverse reactions occur requires knowledge on drug mechanisms at the molecular level. Despite recent advances, the need for tools and methods that facilitate side effect anticipation still remains. Here, we present IntSide, a web server that integrates chemical and biological information to elucidate the molecular mechanisms underlying drug side effects. IntSide currently catalogs 1175 side effects caused by 996 drugs, associated with drug features divided into eight categories, belonging to either biology or chemistry. On the biological side, IntSide reports drug targets and off-targets, pathways, molecular functions and biological processes. From a chemical viewpoint, it includes molecular fingerprints, scaffolds and chemical entities. Finally, we also integrate additional biological data, such as protein interactions and disease-related genes, to facilitate mechanistic interpretations.

Availability and implementation: Our data and web resource are available online (


Supplementary information: Supplementary data are available at Bioinformatics online.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Computational Biology / methods*
  • Databases, Pharmaceutical*
  • Drug-Related Side Effects and Adverse Reactions*
  • Humans
  • Internet
  • Pharmaceutical Preparations / chemistry*
  • Software*
  • Toxicity Tests / methods*
  • User-Computer Interface


  • Pharmaceutical Preparations