A Study of TYRA-300 in Children With Achondroplasia: BEACH301

To join this study, children need to be between 3 and 10 years old. They must have a confirmed diagnosis of achondroplasia and still have 'open growth plates,' which are the areas in their bones that allow them to grow. It's also important that they can stand and walk by themselves and can take medicine by mouth.

There are a few specific groups within the study. Some children (aged 5-10) will be in a 'safety group' first. Others (aged 3-10) will either not have had any previous growth-boosting treatments, or they will have had such treatments in the past. Parents or legal guardians must give their permission for their child to take part, and if old enough, the child will also be asked if they want to participate.

Children cannot join the study if they have other serious health conditions that might interfere with the study or their growth, or if they have certain eye problems. Those who have had or plan to have limb-lengthening surgery, or who are taking certain other medications, also won't be able to participate.

If your child takes part in this study, they will receive the study medicine, TYRA-300, which is taken by mouth. The study involves several visits to a clinic where doctors and nurses will check your child's health, measure their growth, and take blood samples to see how the medicine is working and to monitor for any side effects. These visits will help the researchers understand how safe the medicine is and what dose might be most effective.

Your child will be carefully monitored throughout the study. The study duration is not specified in detail, but it will involve regular check-ups and follow-up appointments. The medical team will explain the full schedule of visits and assessments before you decide to participate.