Which of the following is an effect of inhalants?

Inhalants have a range of effects on the central nervous system, and slurred speech is one of the common symptoms associated with their use. This occurs because inhalants depress brain function, which can lead to a decrease in motor coordination and an inability to articulate words clearly. The intoxicating effects of inhalants can mimic those of alcohol intoxication, resulting in changes to speech patterns, similar to what is observed when an individual is under the influence of alcohol.

In contrast, other effects mentioned in the options, such as invulnerability and heightened perception, are not typically associated with inhalant use. Users may feel a false sense of security or invincibility, but this is more about the subjective experience rather than a physiological effect. Furthermore, increased heart rate can occur with certain stimulants rather than with inhalants, which more often depress the heart rate or affect it unpredictably due to their impact on the nervous system. Ultimately, slurred speech is a clear and observable symptom stemming from the depressant qualities of inhalants.