distraught (adj.)

"distracted, frantic, deranged," late 14c., an alteration of the old adjective distract (mid-14c.), which in its regular form is long obsolete. It is a past-participle adjective from the English verb (Middle English distracten) or else from Latin distractus "distracted, perplexed," past participle of distrahere (see distract).

The alteration is perhaps by association with native past-participle forms in -ght, such as caught, bought, taught, brought.