What type of medication is most likely to induce feelings of euphoria?

Stimulants are the type of medication most likely to induce feelings of euphoria. This occurs because stimulants, such as amphetamines and cocaine, increase the levels of certain neurotransmitters in the brain, particularly dopamine. Dopamine is closely associated with the brain's reward system, and its elevated levels can lead to enhanced mood, increased energy, and euphoric feelings.

In contrast, antidepressants primarily focus on balancing mood by altering neurotransmitter levels over time, which may not produce immediate feelings of euphoria. Antipsychotics are designed to manage symptoms of psychosis, such as delusions and hallucinations, and might not induce positive mood states. Antihistamines primarily block histamine receptors to alleviate allergy symptoms and can have sedative effects rather than inducing euphoria. Therefore, the action of stimulants on the brain's reward pathways is what specifically makes them capable of inducing feelings of euphoria.