Can I get a refund if I don't want to go after paying the infusion bag for 3 days?

Legal analysis: Yes, but the doctor who makes the prescription should sign it. Generally speaking, doctors don't sign.

Legal basis: Regulations on Handling Medical Accidents

Article 2 The term "medical accident" as mentioned in these Regulations refers to an accident in which medical institutions and their medical personnel violate laws, administrative regulations, departmental rules, medical care norms and operating procedures in medical activities, resulting in personal injury to patients due to negligence.

Article 3 The handling of medical accidents shall follow the principles of openness, fairness, justice, timeliness and convenience, adhere to the scientific attitude of seeking truth from facts, and ensure clear facts, accurate nature, clear responsibilities and proper handling.