The primary active ingredient in Ambien is zolpidem tartrate [1]. This is the substance that makes Ambien an effective treatment for insomnia.
What is zolpidem tartrate?
Zolpidem tartrate is a sedative-hypnotic medication [1]. It belongs to a class of drugs called imidazopyridines, which act on the central nervous system to help people fall asleep [2]. It works by enhancing the effect of a neurotransmitter called gamma-aminobutyric acid (GABA), which reduces brain activity [3].
What are the inactive ingredients in Ambien?
In addition to zolpidem tartrate, Ambien formulations contain several inactive ingredients, also known as excipients [4]. These ingredients do not have a therapeutic effect but are necessary for the tablet to hold its shape, dissolve properly, and be stable [5]. The specific inactive ingredients can vary slightly between different forms of Ambien (e.g., immediate-release vs. extended-release) and between brands and generics. However, common inactive ingredients in Ambien include:
* Lactose monohydrate [4]
* Microcrystalline cellulose [4]
* Sodium starch glycolate [4]
* Hydroxypropyl methylcellulose [4]
* Magnesium stearate [4]
The coatings for Ambien tablets also contain ingredients like titanium dioxide, hypromellose, and polyethylene glycol [4].
Are there different forms of Ambien and how do their ingredients differ?
Yes, Ambien is available in different formulations, including Ambien (immediate-release) and Ambien CR (controlled-release) [6]. The active ingredient, zolpidem tartrate, is present in both. The difference in their release mechanisms is achieved through different combinations and structures of inactive ingredients in the tablet coating and core, which affect how the drug dissolves and is absorbed in the body [7].
Can specific ingredients in Ambien cause allergic reactions?
Individuals can have allergic reactions to any of the ingredients in a medication, including both the active ingredient (zolpidem tartrate) and the inactive excipients [5]. If someone experiences symptoms of an allergic reaction after taking Ambien, they should seek medical attention immediately [8].
Are there alternatives to Ambien with different ingredients?
Yes, there are other medications used to treat insomnia that contain different active ingredients [9]. These may include other sedative-hypnotics or medications from different drug classes. For example, benzodiazepines or certain antidepressants are sometimes prescribed off-label for sleep. The choice of alternative depends on an individual's medical history and specific sleep issues [9].