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

It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction.

Mifepristone blocks a natural substance (progesterone) that is needed for your pregnancy to continue.

It is thought to work by blocking a certain natural substance (acetylcholine) and preventing its effects on the inner ear.

They work by blocking a substance called histamine, which your immune system produces in response to allergens.

Hydroxyzine also blocks a natural substance that your body makes during an allergic reaction (histamine).

The cells contained genes responsible for a protein that blocks a natural substance that causes inflammation.

Metoclopramide works by blocking a natural substance (dopamine).

Trihexyphenidyl belongs to a class of medication called anticholinergics that work by blocking a certain natural substance (acetylcholine).

Dabigatran is an anticoagulant that works by blocking a certain substance (a type of clotting protein called thrombin) in your blood.