Repurposing the anti-angina drug Ranolazine into an analgesic drug: Ranolazine-based activation of the PD-1 pathway for Pain therapy: Ranolazine  increases the expression of PD-L1, attenuates acute and chronic pain, and suppresses mechanical and thermal hypersensitivity and inhibits nociceptive neuron excitability, via up-regulation of its target gene, 24/August/2018, 11.20 pm