Whenever lloyd uses his favorite drug, he experiences intense euphoria, mental alertness, and increased self-confidence. these psychological responses occur because the drug he takes blocks the reuptake of dopamine, serotonin, and norepinephrine, which potentiates the effects of these neurotransmitters. lloyd's favorite drug is:

cocaine.

Explanation:

Cocaine -

It is very common drug taken by people , which is commonly inhaled as smoke , snorted or can even be injected into to viens .

The effect of this drug is the extreme feeling of happiness or distress , in which the person does not have any idea about the reality , it usually makes the heart rate faster , larger pupils and sweating.

The effect of this drug starts within seconds as soon as it is taken by the person .

Over dose of such drugs is very dangerous to life which can increases the body temperature , and the results are fatal.

Hence , from the given information of the question,

The correct term is cocaine.