partner with severe hyperactive adhd

Hey, I would really like to hear from people who have adhd , and have had success with meditation. My partner has really severe adhd symptoms and it's affecting his life and mine and feels like we are in constant chaos. I care for him a lot and want to help him. It just seems like he can't slow down and everything is just in major dysfunction. I've asked him to try a meditation practice but sitting still and with his racing mind , it doesn't go well. Can anyone give insight into this? Are people with hyperactive adhd able to find benefits with a regular practice? Many thanks to all