— 藥理與非經腸給藥 · MEDIUM · MCQ —
護理師正給予青黴素 G 苯芐青黴素（penicillin G benzathine）的肌肉注射。病人詢問為何注射時非常疼痛。護理師應解釋該藥物是：
A nurse is administering an intramuscular injection of penicillin G benzathine. The client asks why the injection hurts so much. The nurse should explain that the medication is:
- AA slow-releasing form that requires a large volume.一種需要大體積的緩釋製劑
- BA medication that causes nerve damage.會造成神經損傷的藥物
- CA suspension that requires deep intramuscular injection.✓ 正解需要深層肌肉注射的懸浮液
- DAn irritant that causes temporary inflammation.會造成暫時性發炎的刺激性藥物
— Explanation · 中文詳解 —
青黴素 G 苯芐青黴素（Penicillin G Benzathine）的物理化學性質屬於油性懸浮液，粒子較粗且黏稠。為了確保藥物能穩定釋放並被肌肉組織有效吸收，必須進行深層肌肉注射（Deep IM）。由於藥物本身性質及注射體積大，注射時確實會引起明顯疼痛，此屬藥物本身的物理特性，而非神經損傷或發炎。
Penicillin G benzathine is formulated as a thick, oily suspension to provide a slow-release effect, which necessitates a deep intramuscular injection into a large muscle mass. The viscous nature of the medication and the depth of the injection are the primary causes of the significant pain experienced by the client.