Nano-drug for Pain Medicine.

Pain is commonly categorized into two diverse groups: acute pain, characterized by early onset and last for a very short time; while chronic pain, characterized by a prolonged pain for least 3 months' duration. Timely and immediate management of critical pain is critical in reducing its aggravation to chronic pain. There has been successful application of nano-technology, nano-medicine to the treatment and management of pain both in clinical and experimental studies like the fabrication of nano-formulated liposomes to deliver drugs for pain therapy, formulation of non- steroidal anti-inflammatory drugs (NSAIDs). However safety issues related with NSAIDs have impelled the fabrication and the design of new drug formulations that reduces side effects and sustain efficacy. This review will give a concise summary on the available studies on the application of nano-formulated drugs designed for pain treatment and management.