Final answer:
Isordil, Motrin, and Digoxin cannot be obtained over-the-counter (OTC) while Lasix can be obtained OTC.
Step-by-step explanation:
When gathering a patient's medications, Isordil, Motrin, and Digoxin cannot be obtained over-the-counter (OTC). Only Lasix can be obtained OTC. Lasix, also known as Furosemide, is a diuretic medication that is used to treat fluid retention (edema) and high blood pressure. It works by increasing the amount of urine produced by the kidneys, which helps to remove excess water and salt from the body.