Final answer:
A generic drug may not be effective due to variations in manufacturing process, inactive ingredients, or differences in absorption and metabolism.
Step-by-step explanation:
A generic drug may not be effective for a patient when the brand name drug is due to variations in the manufacturing process, inactive ingredients, or differences in the way the drug is absorbed and metabolized by the body.
For example, the inactive ingredients in the generic drug may be different from those in the brand name drug, which can affect how the drug is released and absorbed in the body.
Additionally, the bioavailability of the drug, which refers to the extent and rate at which it reaches the targeted site of action, may vary between the generic and brand name versions.
Learn more about Effectiveness of generic drugs compared to brand name drugs