เมื่อเขาใช้ยาแก่เธอ ยาตัวนี้ก็จะฆ่าทั้งตัวเขาเองและตัวเธอ
because a spouse like that would make him so desperate,
that he would like to kill himself or kill her,
as she would never leave him
and the effects are everlasting and irreversible.
We guess it’s intended to “remove” life, in other words it’s actually a poison