Hydrogel blends with adjustable properties as patches for transdermal delivery

Area of Science:

• Materials Science
• Pharmaceutical Sciences
• Biomedical Engineering

Background:

• Transdermal drug delivery systems (TDDS) offer advantages for controlled medication administration.
• Hydrogel blend patches, utilizing natural polymers like pectin and gelatin, present tunable properties for TDDS.
• Optimizing preparation parameters is crucial for achieving desired rheological and pharmaceutical characteristics in hydrogel patches.

Purpose of the Study:

• To investigate the impact of preparation parameters on the rheological and pharmaceutical properties of pectin-gelatin hydrogel blend patches.
• To evaluate the suitability of these hydrogel patches as a transdermal delivery formulation for model drugs.
• To assess the drug loading homogeneity and in vitro drug release performance of the developed patches.

Main Methods:

• Hydrogel blend patches were fabricated using pectin and gelatin via a two-step gelation process (thermal and ionic).
• Rheological properties were characterized using oscillation stress sweep measurements to determine viscoelasticity.
• Testosterone was used as a model drug to evaluate drug loading distribution and in vitro release profiles.

Main Results:

• The two-step gelation process allowed for adjustable patch properties.
• Oscillation stress sweep measurements provided insights into the viscoelastic behavior of the hydrogel patches.
• Homogeneous drug distribution and reproducible in vitro release profiles were achieved, demonstrating the potential of these patches for transdermal administration.

Conclusions:

• Pectin-gelatin hydrogel blend patches are a promising platform for transdermal drug delivery.
• Preparation parameters significantly influence the rheological and pharmaceutical characteristics of the patches.
• The developed patches exhibit good reproducibility and reliability for transdermal administration of model drugs like testosterone.