Final answer:
The Physician's Desk Reference (PDR) is a comprehensive resource used to find information on drug equivalents. The U.S. Food and Drug Administration (FDA) website is another useful resource for finding information on generic drugs and their therapeutic equivalence.
Step-by-step explanation:
The reference book used for drug equivalents is the Physician's Desk Reference (PDR). The PDR is a comprehensive resource that provides detailed information on prescription drugs, including drug equivalencies. It includes a wealth of information such as indications, dosages, side effects, contraindications, and interactions.
The PDR is widely used by healthcare professionals, including physicians, pharmacists, and nurses, to make informed decisions about prescribing and administering medications.
Another useful resource is the U.S. Food and Drug Administration (FDA) website. The FDA provides detailed information on generic drugs, including their therapeutic equivalence to brand-name drugs. The FDA website also provides a list of approved generic drug products, which can be used as a reference for drug equivalents.