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Related Experiment Videos

Bioinorganic study on [Fe(promethazine)2H2O Cl]2+ complex.

A V Trivedi1, J Shukla, K S Pitre

  • 1Department of Chemistry, Dr H S Gour University, Sagar, India.

Indian Journal of Experimental Biology
|March 23, 1999
PubMed
Summary

Iron (III) coordination chemistry with the antihistamine promethazine forms a six-coordinate complex. This metal-drug interaction was studied in vitro, revealing changes in antihistaminic activity upon complexation.

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Area of Science:

  • Coordination chemistry
  • Medicinal chemistry
  • Inorganic chemistry

Background:

  • Antihistaminic drugs like promethazine are crucial for treating allergies.
  • Understanding metal-drug interactions is vital for pharmaceutical development.
  • Iron (III) coordination complexes have diverse applications.

Purpose of the Study:

  • To elucidate the coordination chemistry of iron (III) with promethazine.
  • To investigate the in vitro metal-drug interaction between iron (III) and promethazine.
  • To determine the impact of complexation on the antihistaminic activity of promethazine.

Main Methods:

  • Synthesis of a six-coordinate iron (III)-promethazine complex: [Fe(Prometha)2(H2O)Cl]Cl2.
  • In vitro study of metal-drug interaction using polarography at physiological conditions.

Related Experiment Videos

  • Characterization of the complex using elemental analysis, magnetic, conductometric, IR, UV-visible, NMR, and mass spectrometry.

    • Main Results:

    • The complex features a low-spin, six-coordinate iron (III) center with two promethazine molecules coordinated via N,N donor sites.
    • Spectroscopic and elemental analysis confirmed the coordination of one chloride ion.
    • Changes in antihistaminic activity were observed and quantified post-complexation.

    Conclusions:

    • The study successfully characterized the iron (III)-promethazine complex and its coordination environment.
    • Metal-drug complexation significantly alters the antihistaminic properties of promethazine.
    • A potential mechanism for the observed activity changes is proposed.