What is pharmacodynamics?

Correct Answer: B

Rationale: Pharmacodynamics refers to the drug's actions at receptor sites and the physiological, chemical, and behavioral effects produced by these actions. It involves understanding how drugs interact with the body at the molecular level to produce their effects, including mechanisms of action, receptor binding, and downstream physiological responses. Choice A is incorrect because it describes pharmacopeia, which is a reference book containing standards for drugs. Choice C refers to efficacy, which is the maximum effect a drug can produce. Choice D describes pharmacokinetics, which focuses on the movement of drugs within the body.

Correct Answer: C

Rationale: The correct response is C. Heparin does not dissolve clots; it prevents new clots from forming. Heparin works by inhibiting the formation of new clots and the extension of existing clots, rather than directly dissolving them. The client should be informed that the purpose of heparin therapy is to prevent the clot from getting larger and to reduce the risk of new clots forming. Choices A, B, and D are incorrect. Choice A talks about reaching a therapeutic blood level of heparin, which is not related to clot dissolution. Choice B deflects the question to a pharmacist without providing relevant information. Choice D inaccurately suggests that an oral medication will dissolve the clot, which is not the mechanism of action for heparin.

Correct Answer: B

Rationale: Monitoring for muscle pain is crucial when taking colchicine because it can lead to rhabdomyolysis, a serious condition characterized by muscle breakdown. This adverse effect needs prompt identification to prevent complications. Choices A, C, and D are incorrect because taking colchicine with food, experiencing increased bruising, or increasing grapefruit juice intake are not relevant instructions for a client prescribed colchicine for gout.

Correct Answer: B

Rationale: Verapamil is known to cause hypotension as one of its adverse effects due to its vasodilatory properties. Therefore, it is essential for the healthcare professional to monitor the client's blood pressure closely during and after administration to prevent complications such as severe hypotension. Hyperthermia, ototoxicity, and muscle pain are not commonly associated with verapamil administration, making choices A, C, and D incorrect.

Correct Answer: B

Rationale: The correct instruction for dry mouth associated with diphenhydramine is to chew on sugarless gum or suck on hard, sour candies. These actions stimulate saliva production, providing relief from dry mouth. Administering the medication with food (Choice A) may help reduce stomach upset but won't address dry mouth. Placing a humidifier at the bedside (Choice C) can help with dry air-related issues but won't specifically target dry mouth. Discontinuing the medication (Choice D) without consulting the provider is not recommended and may lead to inadequate treatment of poison ivy.