Alcohol can decrease how quickly the body breaks down caffeine.

The alcohol in beer might decrease how quickly the body gets rid of some medications for pain.

Some studies suggest that alcohol decreases estrogen and can lead to irregular periods.

Alcohol may decrease the effectiveness of this drug.

In a strange twist to conventional wisdom, it seems alcohol might decrease the chances of developing atherosclerosis and having a heart attack.

Even in moderate amounts, alcohol inactivates folate and decreases its availability to the body.

Alcohol decreases iconic memory (a type of visual short-term memory).

Alcohol decreases the levels of this vitamin and increases toxicity when alcohol is consumed in large amounts.

According to one study, cocaine, heroin, amphetamine, alcohol, and nicotine cause decreases in D receptor quantity.

Consuming alcohol with β-carotene can decrease its ability to convert to retinol and could possibly result in hepatotoxicity.