Why are barbiturates considered less than ideal for treating anxiety?

Barbiturates are considered less than ideal for treating anxiety primarily because they are highly addictive. This characteristic poses significant risks for individuals who might require long-term treatment for anxiety. The potential for addiction means that patients can develop a dependency on the medication, leading to a cycle of increased dosing, withdrawal symptoms, and a range of social and health-related issues. Furthermore, barbiturates can lead to tolerance, wherein individuals need to take higher doses to achieve the same effect, thereby increasing the risk of overdose.

In contrast, the other options do not align with the characteristics of barbiturates. They are not known for being non-addictive; rather, the opposite is true. Also, while they can be effective, their efficacy doesn't apply universally to all cases of anxiety, and their broader spectrum of side effects complicates their use. These factors contribute to the preference for alternative medications, such as benzodiazepines, which, although also carry risks, tend to have a better safety profile and lower potential for addiction when used correctly.