How to tell partners I can't work after 10pm?

Junior assoc. at v5 on east coast. I have a genetic condition that requires me to maintain a ridiculously strict schedule every day (when I eat, amount of water I drink, wake/sleep times, etc). If I don't, I have bad episodes that last 24+ hours. My episodes are similar to a stroke, but no lasting effects.

I've communicated this with HR and they are very understanding and supportive. However, I'm having trouble navigating this when partners send me assignments at 8-9pm and need a quick turn around. I don't want to seem like a slouch, but I seriously cannot go to bed later than 10pm or my body shuts down. I'm willing to work from 6am-10pm, 7 days a week, but cannot work at all outside of that.

Any advice on how to handle this?

Author: ImpressiveSpend7189