It works by blocking a certain natural substance in your body to reduce pain and swelling.

This medication works by blocking the production of these hormones.

It works by blocking the action of testosterone at the hair cell level.

They works simply by blocking some of the object's light to enhance the contrast.

These novel drugs work by blocking the action of leukotrienes.

But it may work by blocking or reducing activity in certain areas of the brain.

It works by blocking the actions of estrogen in the body.

The drugs work by blocking a hormone known to increase blood pressure.

They work by blocking the effects of the immune system, protecting the body from itself.

It works by blocking your body's production of certain natural substances that cause inflammation.