Nicotine also causes the brain to release a chemical called dopamine.

These work by reducing the action of a chemical in the brain called dopamine.

Levodopa is a medication that the body converts to a brain transmitter called dopamine.

Pramipexole has some of the same effects as a chemical called dopamine, which occurs naturally in your body.

Moreover, a brain chemical called dopamine regulates this clock.

Normally, these nerve cells make an important chemical called dopamine.

What cocaine does, you see, is to make the brain produce a thing called dopamine.

Enjoyable behaviors can prompt your brain to release a chemical called dopamine.

Studies showed that a chemical called dopamine is the brain's "pleasure chemical".

Drug addiction and Parkinson's disease, for example, are linked to an imbalance in the production of a neurotransmitter called dopamine.