Which term describes a substance created by barely modifying a drug, resulting in a new drug?

Which term describes a substance created by barely modifying a drug, resulting in a new drug?

• A. Derivative
• B. Analogue
• C. Isomer
• D. Analog

Answer: (B)

In pharmacology, when you create a new compound by making small tweaks to an existing drug, you get an analogue. The idea is that the new substance is structurally related and tends to preserve much of the original drug’s activity while changing some properties, such as potency, selectivity, or how the body processes it. That’s why analogue is the best fit for a substance created by barely modifying a drug to become a new drug. A derivative is a broader term for a compound derived from another and can involve larger changes, not necessarily with similar activity. An isomer has the same molecular formula but a different arrangement of atoms, which can lead to very different properties and isn’t defined by small changes to a known drug. The form without the ‘ue’ is just the American spelling variant of analogue, used interchangeably in many contexts.

In pharmacology, when you create a new compound by making small tweaks to an existing drug, you get an analogue. The idea is that the new substance is structurally related and tends to preserve much of the original drug’s activity while changing some properties, such as potency, selectivity, or how the body processes it. That’s why analogue is the best fit for a substance created by barely modifying a drug to become a new drug.

A derivative is a broader term for a compound derived from another and can involve larger changes, not necessarily with similar activity. An isomer has the same molecular formula but a different arrangement of atoms, which can lead to very different properties and isn’t defined by small changes to a known drug. The form without the ‘ue’ is just the American spelling variant of analogue, used interchangeably in many contexts.