What do potency assays evaluate?

What do potency assays evaluate?

• A. How the dosage affects its activity and how long it stays in the body.
• B. The color change during a reaction.
• C. The molecular weight distribution.
• D. The rate of enzymatic turnover.

Answer: (A)

Potency assays measure how the biological activity of a substance relates to the dose and how long that activity lasts in the body. In other words, they look at the dose–response: how different amounts of the drug produce different levels of effect, and they also consider duration of action—how long the effect persists due to the drug’s pharmacokinetics (absorption, distribution, metabolism, and excretion). This combination is what determines potency and overall effectiveness. The other ideas—color changes during a reaction, molecular weight distribution, or the rate of enzymatic turnover—don’t assess how a drug’s activity changes with dose or how long its effect lasts in the body.

Potency assays measure how the biological activity of a substance relates to the dose and how long that activity lasts in the body. In other words, they look at the dose–response: how different amounts of the drug produce different levels of effect, and they also consider duration of action—how long the effect persists due to the drug’s pharmacokinetics (absorption, distribution, metabolism, and excretion). This combination is what determines potency and overall effectiveness. The other ideas—color changes during a reaction, molecular weight distribution, or the rate of enzymatic turnover—don’t assess how a drug’s activity changes with dose or how long its effect lasts in the body.