What drug blocks the effects of certain neurotransmitters on the brain

Explanation:

Cocaine is a highly addictive drug which elevate levels of attention, energy and alertness, it can be seen as an stimulant because of these effects.

This drug blocks certain neurotransmitters like dopamine, serotonin and norepinephrine. What cocaine does is to bind to the transporters that remove the excess of these neurotransmitters, basically, cocaine cause an excess of these neurotransmitters, that's why people feel the effect of more energy and attention. Cocaine prevent the reabsorption of these transporters which causes the "increase". The final result is an amplification of these neurotransmitters, that's why this drug is highly addictive.

his week a heat wave will be hitting, and most of the country will be experiencing temperatures above average for july. due to humidity, the temperature outside can feel even warmer than it actually is. this adjusted temperature, often referred to as the “feels like” temperature is called the heat index. the chart shows the heat index, which is calculated based on temperature and relative humidity. use this chart to answer the following questions.  

the answer is shoe size