Endorphins reducing stress levels
When did you first notice your child acting different.? How long has this beem going on? What is the las thing thwy ate or drank. Do they have any illnesses that you know of and if so are they on medication now for it. how much do you dose your child for their.condition.
By he NIH trying a new drug to help reduce pain associated with sickle-cell anemia, it's an example of an "experiment".
An experiment involves a hypothesis (an educated guess as to what's going to happen) and trying out the hypothesis and finding the solution.
The oath taken by physicians is popularly known as The Hippocratic Oath
Hope this helps! :)