Differences between benzodiazepines & Z-drugs

Benzodiazepines and Z-drugs are medications with calming and sedative effects —this means they have a relaxing effect and promote sleep. Both influence the GABA system in the brain. This system regulates the sympathetic nervous system, which is responsible for the so-called fight-or-flight response —i.e., the physical stress response in dangerous situations.

Benzodiazepines are used differently depending on their duration of action. Preparations with a longer duration of action (2–13 hours) are particularly effective against anxiety and stress, while short-acting benzodiazepines are used to promote sleep. They can take up to two days to break down and can be detected in urine for up to three weeks. In addition to their calming effect, benzodiazepines can also lift the mood or cause euphoria.

Z-drugs have a significantly shorter duration of action (1–5 hours) and are broken down more quickly. They are used exclusively to promote sleep and do not accumulate in the body, which is why they are detectable for a shorter period of time. Unlike benzodiazepines, Z-drugs do not have a euphoric or mood-enhancing effect.

Important difference in effect: Due to their neurochemical mode of action, benzodiazepines bind to more GABA receptors than Z-drugs. This results in a different perceived effect: In addition to their calming and sleep-promoting effects, benzodiazepines can also have euphoric, mood-lifting, and emotion-dampening effects. This is not the case with Z-drugs—they have a purely sleep-promoting effect.

Both substance groups carry a high risk of dependence – both psychological and physical. Regular consumption can lead to physical dependence. Abrupt withdrawal is dangerous, as the original problems such as sleep disorders, anxiety, or panic attacks may recur or worsen.

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Well-known benzodiazepines with active ingredient and trade names:

diazepam

Valium, Faustan, Stesolid

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Lorazepam

Tavor, Temesta, Anxiolit

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Alprazolam

Xanax, Tafil

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clonazepam