Stops the seizures (7)
I believe the answer is:
arrests
I believe this is a double definition.
'stops' is the first definition.
(arrest is a kind of stop)
'the seizures' is the second definition.
(arrest is a kind of seizure)
(Other definitions for arrests that I've seen before include "made by police" , "Checks" , "collars" , "has a heart attack" , "Stops and takes into custody" .)