When a medicine is given to relieve pain, it is called
a negative reinforcer.
Migraine is a type of chronic headache that usually affects a part of the head and is accompanied with nausea and blurred vision.
The medicine that is given to patients with this disorder are generally called pain-relieving medications.
But in psychology, the medicine that is given is a negative reinforcer to the migraine which is causing a pain stimulus.
A negative reinforcer is something or a substance that is capable of taking away an uncomfortable response to a stimulus such as the pain from the migraine.
Therefore, when a medicine is given to relieve pain, it is called a negative reinforcer.
Learn more about migraine here:
https://brainly.com/question/14974427