The following drugs are considered safe in lactation:

Correct Answer: D

Rationale: These drugs are generally safe during breastfeeding, with minimal risk of transfer to the infant.

Correct Answer: C

Rationale: An agonist is a substance that binds to a receptor and triggers a biological response. By activating the receptor, an agonist mimics the action of the body's natural ligand that typically binds to the receptor. This activation may lead to a cascade of events within the cell, resulting in a specific physiological response. In contrast, antagonists block the receptor from being activated, while agonists work by binding to the receptor and initiating the desired response.

Correct Answer: D

Rationale: Nalbuphine is an opioid agonist-antagonist used for pain management. Like other opioids, it can cause respiratory depression, so monitoring respirations is critical. Bradycardia is another potential side effect that patients should report. Administering nalbuphine undiluted is not standard practice, as it can increase the risk of adverse reactions. Excessive urine output is not associated with nalbuphine use. Therefore, the nurse should focus on monitoring respirations and educating the patient to report bradycardia.

Correct Answer: C

Rationale: Sildenafil (Viagra), a phosphodiesterase-5 inhibitor for erectile dysfunction, has a recommended dosing limit of one pill per 24 hours to prevent overdose risks like prolonged erections or cardiovascular strain, making this a critical safety instruction. Grapefruit juice actually increases sildenafil levels by inhibiting metabolism, not decreasing effects, which could heighten side effects. Timing is optimal at 1 hour before sex, with effectiveness possible up to 4 hours, not 6, ensuring accurate expectations. Taking it on an empty stomach enhances absorption, as food-especially high-fat meals-delays onset, contrary to the food suggestion. The 24-hour limit is foundational for safe use, balancing efficacy with minimizing adverse effects like headache or hypotension, and aligns with standard prescribing guidelines, making it the priority in client education.

Correct Answer: A

Rationale: Stimulants are drugs that increase the body's activity levels. They work on the central nervous system to enhance alertness, attention, and energy. Examples of stimulants include caffeine, amphetamines, and nicotine. Stimulants can increase heart rate, blood pressure, and metabolism, leading to heightened physical and mental activity.