Chlorpromazine (Thorazine) is prescribed for a patient, and the nurse provides instructions to the patient about the medication. The nurse includes which information?

Correct Answer: B

Rationale: The correct answer is B because chlorpromazine can cause photosensitivity, making the patient more prone to sunburn and skin damage. It is essential for the patient to wear sunscreen while outside to protect their skin. Choice A is incorrect as there is no specific interaction between chlorpromazine and caffeine. Choice C is incorrect because long-term therapy with chlorpromazine is more likely to result in sedation and drowsiness rather than nervousness and excitability. Choice D is incorrect as antacids may interfere with the absorption of chlorpromazine, so they should not be taken together.

Correct Answer: A

Rationale: Rationale: 1. Guaifenesin is an expectorant that helps loosen and thin mucus in the respiratory tract. 2. It aids in the removal of excessive, thick mucus, making it easier for the patient to cough it out. 3. Benzonatate is a cough suppressant, not an expectorant. 4. Diphenhydramine is an antihistamine and not indicated for mucus removal. 5. Dextromethorphan is a cough suppressant and does not help in mucus expectoration. In summary, guaifenesin is the correct choice as it specifically targets mucus removal, while the other options do not have this expectorant effect.

Correct Answer: D

Rationale: The correct answer is D: Inhalation. Parenteral administration involves delivering medications directly into the bloodstream, bypassing the digestive system. Inhalation allows the medication to enter the bloodstream through the lungs, making it a parenteral route. Rectal (A), oral (B), and sublingual (C) routes all involve absorption through the digestive system, so they are not considered parenteral routes.

Correct Answer: D

Rationale: The correct answer is D: Tachyphylaxis. Tachyphylaxis refers to a rapid decrease in response to a drug that develops within minutes. This term specifically describes the phenomenon of developing a tolerance to a drug in a short period of time. Refractoriness (A) generally refers to a lack of response to a drug over time. Cumulative effect (B) is the gradual build-up of a drug's effects with repeated doses. Tolerance (C) is the gradual decrease in response to a drug over an extended period, not within minutes. Thus, the most appropriate term for a rapid decrease in responsiveness to a drug is tachyphylaxis.

Correct Answer: A

Rationale: The correct answer is A: Cocaine. Cocaine is only used for surface or topical anesthesia due to its potent vasoconstrictive properties and high potential for systemic toxicity. It is not suitable for deeper anesthesia due to its side effects. Tetracaine, Mepivacaine, and Lidocaine can be used for both surface and deeper anesthesia, unlike Cocaine.