Definition: Anilopyrin (also known as zolpidem) is a prescription drug used to treat insomnia, sleeplessness, or excessive sleepiness. It's a selective serotonin reuptake inhibitor (SSRI) that helps improve sleep quality and duration in some people who have trouble falling asleep. It acts on the neurotransmitter GABA (gamma-aminobutyric acid), which is crucial for maintaining proper neural function and sleep. The exact mechanism of action depends on individual response and can vary from person to person. In summary, Anilopyrin is a prescription medication used in treating insomnia caused by difficulty falling asleep or staying asleep. It works by blocking the action of GABA, which affects brain activity related to sleep. However, it's important to note that Anilopyrin should be used under medical supervision and may not work for everyone. For more information about Anilopyrin and its use, please consult with a healthcare provider or a licensed therapist who can advise you based on your specific condition.