The common effects of hallucinogens are: increased alertness, excitation, euphoria, increased pulse rate, increased blood pressure, insomnia, and loss of appetite. a. trueb. false

The common effects of hallucinogens that are given in the question are "false"

Explanation:

The common effects of hallucinogens Increased body temperature, the feeling of dry mouth, Problems related to sleeping, Excessive sweating, uncoordinated movements as well as the feeling of relaxation are the few effects of the hallucinogens. Mostly the hallucinogens are found to be interact with the hormone serotonin and also with the prefrontal cortex of the brain. The gets directly in contact with the central nervous system.  Which affects the other metabolic actions.