If A Person Normally Takes Prozac (dosage Unknown) And Accidentally

If a person normally takes Prozac (dosage unknown) and accidentally get Abilify (20mg) one time by mistake, how much harm could they experience? Staff recognized their error early on and telephoned the doctor who instructed her to give the resident all the other meds and to just withhold the Prozac, I understand that Prozac and Abilify are similar drugs.