Final answer:
The false statement is that over-the-counter drugs must be prescribed by a physician. Over-the-counter drugs can be bought without a prescription, unlike prescription drugs.
Step-by-step explanation:
The statement regarding medications that is FALSE is: C) Over-the-counter drugs must be prescribed by a physician. This is not correct because over-the-counter (OTC) drugs can be purchased without a prescription.
Statements A) and B) are true as many medications do have multiple names, and some medications can indeed affect more than one body system. Statement D) is also true, as it is important for EMTs to inquire about all substances a patient may be taking, including herbal remedies and vitamins, because they can have interactions with medications.