The reason is because these medicines are used to heal people of their ailments and sicknesses.
(The reason; is; because these medicines are used to heal people of their ailments and sicknesses) (these medicines; are used; to heal people of their ailments and sicknesses) (these medicines; to heal; people of their ailments and sicknesses)
The reason these medicines these medicines
is are used to heal
because these medicines are used to heal people of their ailments and sicknesses
to heal people of their ailments and sicknesses
people of their ailments and sicknesses