1 INTRODUCTION
Acetaminophen is a 4-aminophenol (Figure 1) also known as paracetamol is a non-narcotic analgesic used as an analgesic and antipyretic. Acetaminophen is used for mild to moderate pain; its efficacy is low as analgesic as compared to non-steroidal anti-inflammatory drugs (NSAIDs) as it has no any anti-inflammatory effect (Ohashi & Kohno, 2020). Clinical evidences for use of acetaminophen in neuropathic pain are insufficient (Freo et al., 2021).