EVALUATION OF PAIN-KILLING ACTION OF ACETYLSALICYLIC ACID NANOPARTICLES ON THERMAL NOCICEPTION IN MICE

Area of Science:

• Pharmacology and Drug Delivery
• Nanotechnology in Medicine
• Pain Management Research

Background:

• Pain relief is a critical healthcare need, with nonsteroidal anti-inflammatory drugs (NSAIDs) like aspirin being common analgesics.
• Aspirin's efficacy can be formulation-dependent, influencing its absorption and effectiveness.
• Investigating novel delivery systems, such as nanoparticles, is key to improving drug performance.

Purpose of the Study:

• To compare the analgesic efficacy of ordinary aspirin particles versus aspirin nanoparticles in topical formulations.
• To evaluate the influence of different topical bases (gel, ointment, cream) on aspirin's pain-relieving properties.
• To assess the antinociceptive effects using the hot plate method in an animal model.

Main Methods:

• Utilized 120 male albino mice, divided into six experimental groups.
• Topically applied aspirin in gel, cream, and ointment formulations at varying concentrations (0.25%, 0.5%, 1%) with both ordinary and nanoparticle forms.
• Measured antinociceptive effects by assessing reaction times at multiple intervals post-application using the hot plate method.

Main Results:

• Aspirin nanoparticles exhibited the most significant analgesic impact across all formulations.
• Topical cream and ointment formulations showed moderate analgesic effects, outperforming the gel.
• Increased reaction times compared to controls indicated dose-dependent antinociceptive activity for both forms.

Conclusions:

• Aspirin nanoparticles represent a more effective analgesic form compared to ordinary aspirin particles, likely due to enhanced bioavailability.
• Topical formulation significantly impacts aspirin's analgesic effectiveness, with cream and ointment showing promise.
• Nanoparticle technology holds potential for optimizing aspirin's pain relief capabilities, warranting further clinical investigation.