Enhancement of the analgesic activity of paracetamol and nitroparacetamol by the oral administration of all-trans retinoic acid.
Alfonso Romero-Sandoval E, Molina C, Herrero JF. Enhancement of the analgesic activity of paracetamol and nitroparacetamol by the oral administration of all-trans retinoic acid. Neuropharmacology. 2006 Sep; 51(4):858-65.