How to photostabilize molsidomine tablets

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.