A swellable polymer as carbamazepine dissolution rate enhancer.

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Materials Science

Background:

• Carbamazepine, an essential anti-epileptic medication, exhibits poor water solubility, limiting its bioavailability.
• Enhancing the dissolution rate of poorly soluble drugs is crucial for improving therapeutic efficacy.
• Superdisintegrants offer a promising approach to accelerate drug dissolution.

Purpose of the Study:

• To investigate the use of cross-linked sodium carboxymethylcellulose (Ac-Di-Sol) as a superdisintegrant.
• To enhance the dissolution rate of carbamazepine.
• To evaluate different drug/polymer system preparation methods.

Main Methods:

• Preparation of three carbamazepine/Ac-Di-Sol systems: physical mixture, solvent evaporation, and spray drying.
• In vitro dissolution testing of all prepared systems and pure carbamazepine.
• Differential Scanning Calorimetry (DSC) analysis to assess drug crystallinity.

Main Results:

• All prepared systems demonstrated an increased dissolution rate of carbamazepine compared to the pure drug.
• The physical mixture and the spray-dried system showed particularly significant improvements in dissolution.
• DSC analysis confirmed that no amorphisation of carbamazepine occurred during the preparation processes.

Conclusions:

• Ac-Di-Sol effectively enhances the dissolution rate of carbamazepine.
• The preparation method influences the extent of dissolution enhancement.
• The use of Ac-Di-Sol is a viable strategy for improving the delivery of poorly soluble drugs like carbamazepine without compromising drug stability.