primaquine

例句：

1. 1. Primaquine is an antimalarial drug used to treat malaria.
   奎宁是一种用于治疗疟疾的抗疟药物。
2. 2. The patient was given a dose of primaquine to prevent relapse.
   患者被给予奎宁剂量以防止复发。
3. 3. Primaquine has been shown to be effective in treating malaria.
   研究表明，奎宁在治疗疟疾方面是有效的。