The state Medical Examining Board disciplined three doctors on Tuesday, including fining a Norwich doctor $7,500 for failing to keep his prescription pad secure. The board also reprimanded the doctor, John Paggioli, who specializes in pain management. In addition to not providing adequate security of his prescription pad, Paggioli had pre-signed a blank prescription for a patient and held controlled substances in his office for various patients, a consent order he agreed to said. Though he denied any wrongdoing, Paggioli chose not to contest the allegations, the order said. “He absolutely learned from this,” the doctor’s lawyer, Hilary Fisher Nelson of Hartford, told the board.