A client has been prescribed diltiazem (Cardizem), and asks the nurse what type of drug this is. Which response by the nurse is most appropriate?

A. Placing three tablets under the tongue at once is not the recommended initial dosing for nitroglycerin.

B. Nitroglycerin tablets should not be swallowed; they are meant to be taken sublingually (under the tongue) for quick absorption.

C. This is the correct instruction, reflecting the standard protocol for acute angina treatment with nitroglycerin: one tablet under the tongue every 5 minutes as needed, with no more than three tablets in 15 minutes. If pain persists, it is advised to call emergency services.

D. This instruction is inappropriate as it delays immediate treatment for chest pain, which can be critical in the event of acute angina or a heart attack.

A. GABA (gamma-aminobutyric acid) is not typically targeted by antidepressants.

B. While some antidepressants may indirectly affect epinephrine and norepinephrine levels, the primary mechanism of action for most antidepressants is through increasing levels of serotonin and/or norepinephrine.

C. Antidepressants commonly work by increasing the levels of neurotransmitters such as norepinephrine and serotonin in the brain.

D. The reticular formation is not directly involved in the mechanism of action of antidepressants.