If he is in pain, he is supposed to be admitted in the hospital in order to have i.v. medications like antispastics, antiinflamatory, pain medication, antibiotics, even opioids. When needed, lithotripsy.
It is necesary to determine the cause that induces kidney stones. It is important to establish if there is a local or systemic condition.
To prevent kidney stones: cure the cause, if possible, drink plenty of plain water, antispasmodic medication, when pain is present.
Drugs like tamsulosin, an alpha-blocker, are sometimes prescribed to help relax muscles in the ureter, making it easier for kidney stones to pass. However, the best approach depends on the type and size of the stone, its location, component, size …