DP Chemistry (last assessment 2024)

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Question 17N.3.sl.TZ0.18a

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.sl.TZ0.18a
Level sl Paper 3 Time zone TZ0
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 1]
17N.3.sl.TZ0.18a

New drugs undergo thorough clinical trials before they are approved.

(a)

Outline the difference between the therapeutic index in animal studies and the therapeutic index in humans.

[1]

Markscheme

in animal studies LD50 ED50  AND in humans  TD50 ED50

OR

in animal studies lethal dose/LD50 AND in humans toxic dose/TD50

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