There Has Been a Mix Up in Two Patient's Prescriptions

There has been a mix up in two patient's prescriptions and each has received the other person's medication. Sheryl, who is diagnosed with Parkinson's disease, has accidentally been given a medication that decreases dopamine levels. Guillermo, diagnosed with schizophrenia, is given a medication that increases dopamine levels. Fortunately, the error is caught in time and Sheryl and Guillermo are given the correct medication before they take a dose. Hypothetically, describe what might have happened if Sheryl and Guillermo had indeed taken the wrong medicines.