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Related Experiment Videos

How to photostabilize molsidomine tablets.

W Aman1, K Thoma

  • 1Department of Pharmaceutical Technology, Ludwig-Maximilians University, Munich, Germany. wolfgang.aman@gx.novartis.com

Journal of Pharmaceutical Sciences
|June 4, 2004
PubMed
Summary

Photostabilization of light-sensitive molsidomine tablets was improved using pigments and light absorbers. However, only film coating or blistering provided complete photostability against intense light stress.

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Area of Science:

  • Pharmaceutical Sciences
  • Materials Science

Background:

  • Molsidomine tablets are highly sensitive to light, necessitating effective photostabilization strategies.
  • Existing photostabilization methods show limitations in preventing photodegradation under intense light exposure.

Purpose of the Study:

  • To evaluate various photostabilization methods for light-sensitive molsidomine tablets.
  • To determine the efficacy of different photostabilizers, including light absorbers and pigments.

Main Methods:

  • Incorporation of photostabilizers (light absorbers, pigments like titanium dioxide) into tablet formulations.
  • Assessment of photostability through intense light stress testing for 12 hours.
  • Analysis of pigment properties, including surface treatment and pre-blending with the drug substance.
  • Microscopic analysis (scanning electron microscopy) to evaluate particle behavior.

Main Results:

  • Incorporating light absorbers or pigments significantly improved molsidomine tablet photostability.
  • Pigments demonstrated superior photostabilizing effects compared to colorants or UV absorbers.
  • Pre-blending pigments with the drug substance enhanced photostabilization efficacy.
  • Surface-treated titanium dioxide was less effective than untreated due to altered particle characteristics.
  • Complete photostability was only achieved by protecting the tablets with a cover (blistering or film coating).

Conclusions:

  • While photostabilizers enhance light sensitivity mitigation, they do not fully prevent photodegradation.
  • Packaging solutions like film coating or blistering are essential for achieving complete photostability in molsidomine tablets.
  • Careful selection and application of photostabilizers, particularly pigments and titanium dioxide, are crucial for optimizing drug product stability.

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