Dr. Kildare's Crisis (1940)
Dr. Kildare's Crisis is a 1940 drama film directed by Harold S. Bucquet, starring Lew Ayres, Lionel Barrymore and Laraine Day. Mary Lamont's (Laraine Day) financier brother Douglas Lamont (Robert Young) is subject to seizures, and it seems that he is suffering from hereditary epilepsy.
More at Wikipedia.