Aminobutyric acid is a medicinal chemical raw material that is not usually sold in pharmacies, but pharmacies may sell medicines that contain gamma-aminobutyric acid as an ingredient. Aminobutyric acid, or γ-aminobutyric acid, is a water-soluble amino acid. It is widely found in vertebrates, plants, and microorganisms. gamma-Aminobutyric acid is a single ingredient and is not usually sold separately in pharmacies. The main ways to prepare γ-aminobutyric acid include chemical synthesis, plant enrichment, and microbial fermentation. All of these methods require specialized personnel and equipment to produce. Pharmacies are generally not qualified to do so. However, γ-aminobutyric acid can often be used as a component of medications after preparation. For example, γ-aminobutyric acid is contained in compounded γ-aminobutyric acid Vitamin E capsules, which may be available for sale in some pharmacies. It is important to note that gamma-aminobutyric acid has strict dosage regulations for different medications when it is added for use in drugs. Among them, compound aminobutyric acid flavored Vitamin E capsule belongs to the prescription drugs, can not blindly buy and use, so as not to cause physical damage.