**7. Conclusions**

ILs as molecules with unique properties have been the subject of increased interest in recent years. Undoubtedly, the key issue is "green chemistry", which has set the direction of current research. Due to their huge potential, it is natural to use ILs in the search for solutions to many problems in modern laboratories, including their participation in analyzing pharmaceuticals in real samples. The use of analytical methods at various stages confirms the universality and enormous potential of this "solvent design". The application of various chromatographic and electrophoretic techniques and extraction methods together with the possibility of the use of ILs for a wide range of analytes prove that their contribution to the development of analytical methods is not overestimated. At the same time, the limitations that appear during their use show that success in experiments is not easy and this field of research requires further development.

**Funding:** The study was supported by the project POWR.03.02.00-00-I014/17-00 co-financed by the European Union through the European Social Fund under the Operational Programme Knowledge Education Development 2014–2020. This research was funded by the National Science Centre in Poland, project No. 2017/01/X/ST4/00225 and by the National Centre for Research and Development in Poland within V4-Korea Joint Research Program, project MTB No. DZP/V4-Korea-I/20/2018.

**Conflicts of Interest:** The authors declare that there are no conflict of interest.
