Is intractable vomiting the same as persistent vomiting?

These terms are similar but not identitcal. Persistent vomiting is the kind that continues to happen for a long period. Intractable vomiting is the kind that continues to happen even when you treat...

you cant stop the vomiting.

The term for it is hyperemesis, excessive vomiting, such as in hyperemesis gravidarum, the excessive vomiting of pregnancy.

purging

Usually gatorade helps or warm tea. when you vomit you lose electrolytes. They can be found in gatorade or other types of bottled water and they most likely will relax your stomach. If all else fails...