A Study of LY4256984 in Participants With Sporadic Amyotrophic Lateral Sclerosis

To join this study, you need to be an adult between 18 and 75 years old and have been diagnosed with sporadic ALS (Motor Neurone Disease). Your ALS symptoms must have started within the last two years. Your body mass index (BMI), which is a measure of your weight compared to your height, needs to be between 18 and 35.

There are certain reasons why you might not be able to join. For example, if you have other serious health problems that could make it unsafe to take part, such as significant issues with your heart, kidneys, liver, or lungs. You also couldn't join if you have another brain-related disease, severe memory problems, or if your blood tests show certain high levels, or if you have severe kidney problems.

Also, if a heart tracing (ECG) shows an abnormal pattern that the doctors think could put you at risk, or if previous scans of your spine show problems, you might not be able to participate. These rules are to ensure your safety throughout the study.

If you decide to take part in this study, you'll be given either the new medicine, LY4256984, or a placebo (a dummy treatment). This will be given as an injection into the fluid around your spine. Throughout the study, you will have regular check-ups, which will include blood tests to see how your body is reacting to the medicine and how much of it is in your system. This helps the doctors understand its effects and how quickly your body gets rid of it. The exact number of visits and the full duration of your participation will be explained in detail by the study team.