Exploring acetaminophen prodrugs and hybrids: a review

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Drug Discovery

Background:

• Acetaminophen (APAP) and NSAIDs are common pain relievers but have adverse effects.
• Developing innovative drugs with improved properties is crucial for pain management.
• Combining existing drugs offers a practical approach to mitigate adverse effects.

Purpose of the Study:

• To review advances in developing new molecules for pain syndrome treatment.
• To explore molecular combinations of APAP, including prodrugs, codrugs, and hybrids.
• To propose a novel structural classification for these APAP-based entities.

Main Methods:

• Critical review of existing literature on APAP and NSAID combinations.
• Structural analysis and classification of APAP prodrugs, codrugs, and hybrids.
• Examination of ester and amide NSAID-APAP molecules, C-linked APAP, and NO-releasing hybrids.

Main Results:

• A proposed classification includes carrier-linked O-modified APAP, -linked N-modified APAP derivatives (prodrugs), and direct- and spacer-N,O-linked APAP hybrids (codrugs).
• Specific examples like propacetamol, benorylate, acetaminosalol, nitroparacetamol, and agent JNJ-10450232 fit the classification.
• The classification aids understanding of Structure-Activity Relationship (SAR) studies for novel pain relievers.

Conclusions:

• The proposed classification provides a novel framework for analyzing APAP and NSAID molecular combinations.
• This classification facilitates research and design of new analgesic drugs based on APAP and NSAIDs.
• Advances in molecular combinations offer improved pharmaceutical properties and potentially safer pain management options.