彼はてんかんの発作を起こした。
He had an epileptic seizure.
喘息の発作が夜中に出た。
An asthma attack came on in the middle of the night.
He suddenly had a seizure in the middle of the night.
He had an asthma attack and was taken to the hospital.
Taking the medicine allowed him to control the attack.
My grandfather was suddenly struck by a heart attack.
spasmodic; erratic; fitful; sporadic
asthma attack; asthma exacerbation