Caffeine has been used in a variety of medications to produce what?

Alcohol works as a peripheral dilator, causing what result?

The diuretic effects of caffeine have led to its use in what type of medication?

About how many Americans suffer premature deaths related to smoking every year?

Most effects of amphetamines are produced by mimicking acetylcholine.

How has the rate of prescriptions for stimulants to treat ADHD changed since 1990?

At which of the following will the days (amount of daylight vs. darkness) be even?

Cocaine enhances athletic performance involving strength or endurance.

Waves with a high frequency will have a longer wavelength.

Physical dependence on caffeine has not been demonstrated.