Sold under the brand names Sonata, Zaleplon is a sedative-hypnotic used to treat insomnia, although it has not been shown to increase total sleep time or decrease the number of awakenings. It is worth noting that Zaleplon works by acting specifically on receptors in the brain called GABA-A receptors, causing the release of a neurotransmitter called GABA in the brain. Bear in mind that GABA is basically a neurotransmitter that acts as a natural 'nerve-calming' agent. It helps keep the nerve activity in the brain in balance, and is involved in inducing sleepiness, reducing anxiety and relaxing muscles. There are a few things you need to take into consideration before using this medicine, considering Zaleplon does cause drowsiness, not to mention that it impairs concentration and alertness. Besides, sleeping pills in general, including the drug in question, have been associated with an increased risk of death. Additionally, Zaleplon can cause anxiety, blurred or double vision, chest pain, sadness and fever. Remember that this drug is not recommended during pregnancy or breastfeeding. Also remember to take zaleplon just before going to bed or when you have trouble falling asleep.