改良型新药通常被称为"improved"或"enhanced"新药。这个术语用来描述一种新的药物，它的作用比原有的药物更强，副作用更少，或者对特定疾病的治疗效果更好。例如：

"The new improved drug has been shown to be more effective at treating cancer with fewer side effects."
"The enhanced medication has been proven to be more effective at controlpng high blood pressure."

改良型新药的来源通常是研究人员为了提高药物的效果而对其进行改进。通过使用新的配方或添加新的成分，他们可以增强药物的作用，减少其副作用，或更好地控制疾病。例如：

"Researchers have developed an improved version of the drug by adding a new active ingredient."
"The enhanced medication was created by changing the dosage and formulation of the original drug."

改良型新药可以用于治疗各种疾病，包括常见的慢性疾病，如心脏病和糖尿病，以及感染性疾病，如流感和结核病。这些药物可以通过各种途径摄入，包括口服、皮下注射和肌肉注射。例如：

"The improved drug has been shown to be effective in treating influenza when taken orally."
"The enhanced medication has been found to be effective in controlpng high blood pressure when injected under the skin."