Final answer:
Antibiotics can affect the client in surgery and are commonly used to prevent infections.
Step-by-step explanation:
The statement, 'Substances that can affect the client in surgery include antibiotics,' is True. Antibiotics are commonly used in surgery to prevent infections. They are administered before the surgery to help prevent the growth of bacteria.
However, it is important to note that antibiotics may also have side effects and can interact with other medications, so it's crucial to follow the doctor's instructions and inform them about any allergies or other medications being taken.