A neurodegenerative disease causes the cells of the brain and spinal cord to be lost. The functions of these cells include decision-making and control of movements. Damaged and lost cells are not easily regenerated, so the effects of diseases are devastating for the sufferers of Alzheimer's, Parkinson's, multiple sclerosis and Huntington's. Sufferers pay the price of both emotional and physical pain. Caring for a relative with a neurodegenerative disease can be challenging and difficult, draining emotions and causing stress. However, scientists now believe they have found a drug to stop certain neurodegenerative brain diseases. In 2013 they stopped brain cells dying in an animal for the first time, but it was unsuitable for people. Now two similar drugs have been found which should have the same effect on people’s brains. Clinical trials are expected to start soon, and within two or three years we will know if they are effective and safe.