It is permissible to break the fast in Ramadan if you have a severe headache. So you can take medicine and you may eat and drink to take away that pain. But you have to make up the days you missed after Ramadan.

A person who is suffering from kidney failure should not fast on the days when he has dialysis, then if he can make up the fast he should do so. If he cannot make up the fasts because he is elderly and cannot fast, then he should not fast and should feed one poor person for each day.

If you can take the medicine once when breaking the fast and once at suhur, then this is what you have to do, and it is not permissible for you to break the fast because there is no excuse that makes it permissible not to fast.