However , due to the relative hardiness of the suppository - necessary for its insertion into the human body - before the glycerin can act , it must be melted by the heat of the body , and .
It does not take effect for up to an hour .
However , due to the relative hardiness of the suppository - necessary for its insertion into the human body - before the glycerin can act , it must be melted by the heat of the body , and hence it does not take effect for up to an hour .