epilepsy

Dear scholars, as-salamu `alaykum! When is the fast broken? My husband had to break his fast to take his medicine against epilepsy, since he forgot to take it in the morning at suhur. (It's dangerous for him not to take it twice a day). Does this mean that his Ramadan is broken now, or can he just continue the fast tomorrow as if nothing happened until the Eid al-Fitr? Does he have to compensate for the lost day?he felt very bad about what happened and thinks that he will not be able to continue the fast at all, since he failed to keep the Ramadan unbroken. I have tried to encourage him to continue so that we can keep the prayers and the fast together. What advice do you have for us? Best greetings and blessings. Jazakum Allah khayran.