Is Xanax a Barbiturate?
No, Xanax, the pharmacological drug called alprazolam, is not a barbiturate.
Xanax is a type of benzodiazepine, which induces sedation and has a calming effect on the nervous system by binding to a section of the GABA receptor on the secondary, postsynaptic, neuron [1].
Barbiturates, on the other hand, are a class of drugs that induce sedation by hyperpolarising the secondary neuron, making it less likely to respond to an incoming stimulus [2].
Thus although both barbiturates and benzodiazepines have a calming/sedative effect on the body, the way they achieve this and their chemical origin is different.
Barbiturates and Benzodiazepines are also used for distinct clinical indications [3].