Australian Dental Council (ADC) Test 2025 – 400 Free Practice Questions to Pass the Exam

The correct choice indicates that analgesia is not an effect associated with barbiturates. Barbiturates primarily function as central nervous system depressants, which can induce various states including sedation, hypnosis, and even excitement in certain contexts, particularly at lower doses or in specific individuals.

Sedation refers to a calming effect and is a well-known action of barbiturates, making them useful for anxiety relief and relaxation before procedures. Hypnosis, another common effect, describes the induction of sleep or a sleep-like state, which barbiturates are also capable of producing due to their depressant properties. Excitement, while less common, can occur particularly if a person is in a certain state or if the drug is misused or overdosed.

However, analgesia, or pain relief, is not typically associated with barbiturate use. While some drugs in a different class, such as opioids, are specifically designed for pain relief, barbiturates do not have intrinsic analgesic properties. They may alter the perception of pain indirectly due to their sedative effects, but they do not directly address pain relief like analgesics do. Thus, analgesia stands out as the option that does not align with the primary effects of bar