A key role by polymers in microneedle technology: a new era

Area of Science:

• Biomaterials Science
• Pharmaceutical Sciences
• Dermatology

Background:

• The skin is a primary barrier for transdermal drug delivery.
• Microneedles provide an effective method to bypass the stratum corneum.
• Conventional methods face limitations in drug permeation and patient compliance.

Purpose of the Study:

• To review microneedle technology for transdermal drug delivery.
• To focus on the diverse polymers utilized in microneedle fabrication.
• To highlight safety considerations regarding polymer use in microneedles.

Main Methods:

• Review of existing literature on microneedle technology.
• Classification of microneedles based on design (hollow, solid, coated, dissolving, hydrogel).
• Analysis of various natural, semi-synthetic, and synthetic polymers used in microneedle construction.

Main Results:

• Microneedle arrays offer minimally invasive, painless, and self-administrable drug delivery.
• A wide range of polymers, including biodegradable options, are employed.
• Polymer selection is critical for preventing in vivo toxicity.

Conclusions:

• Microneedles represent an advanced transdermal delivery system.
• The choice of polymer significantly impacts microneedle performance and safety.
• Further research into polymer combinations is essential for optimizing transdermal drug delivery systems.