A medicine or treatment which works by changing processes within the body, rather than by evacuating something etc.
Gradually changing, or tending to change, a morbid state into a healthy one.
Causing alteration.
A medicine which preserves or defends against disease; a preventive.
Any device or mechanism intended to prevent harmful consequences.
A prophylactic condom.
Serving to prevent or protect against an undesired effect, especially disease or pregnancy