Which of the following opioids is an antagonist used to reverse opioid overdose effects?

An imaging technique that measures blood flow as an indicator or surrogate measure of neuronal activity is called __________.

At lower doses, these drugs typically produce a feeling of detachment or a feeling of not being part of the environment.

All of the following are psycho-stimulants except?

Which two concepts are essential to explaining the difference in actions of ingested morphine and injected heroin in humans?

Untreated withdrawal from methamphetamine is life-threatening.

Which animal model can indicate how hard an animal will work to get the next dose of drug?

A hypothesis relative to why some people are more likely to become addicted to stimulant drugs states that the level of the ____ receptor is decreased.

Methamphetamine produces dependence, so withdrawal may include fatigue and negative emotions.

Which of the following opiate/opioids was the first drug to be administered by injection?