Pharmacodynamics 2 Flashcards Preview

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Flashcards in Pharmacodynamics 2 Deck (13)
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1
Q

Why is binding not sufficient to produce response?

A

Need conformational change in the receptor to lead to activting of cellular signlaing

2
Q

Intrinsic ativity

A

ability of agonist to impart activating stimulus to a receptor

3
Q

Full vs/ partial agonists

A

Full have higher intrinsic activity

4
Q

As concentration of drug increases

A

There is dose dependent response until it reaches a maximum

5
Q

How is max effect reached

A

DOES NOT have to have all receptors occupied to produce maximal response from system

6
Q

Receptor reserve/spare receptors

A

Excess receptor population

7
Q

If occupancy and response a linear relationship?

A

No, can have fewer than 50% fo receptors occupied to produce 50% response

8
Q

Why is there a nonlinear response

A

Amplification of signaling pathways

9
Q

ED50

A

Dose at which 50% of the maximal effect is observed

10
Q

Potency

A

Concentration of a drug required to produce a given physiologic effect

Higher receptor affinity means higher potency

11
Q

Potency shift on a log dose graph

A

Lower potency to the right of the graph

12
Q

Efficacy

A

Maximal level of response a drug can produce

Efficacy of full agonists higher tha partial

13
Q

Efficacy on graph

A

Lower means lower max and shifted to the right