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(US), anesthetic
a substance that causes anaesthesia



a substance that acts selectively on the central nervous system and induces a state of anesthesia.

The meaning of the term “anesthetic” has changed in the course of the development of pharmacology. Anesthetics used to include nervous-system depressants and stimulants, as well as many substances that only indirectly affect the nervous system. From the beginning of anesthetic practice, stimulants, depressants, and various indirectly acting substances were the principal anesthetics. Neurotropic agents with different types of action, for example, analgesic, somnifacient, and tranquilizing, are grouped separately. Application of the term “anesthetic” to denote substances of plant or synthetic origin that are narcotics—morphine, oxycodone, Trimeperidin. for instance—was determined by convention, as was the use of the term “narcotic” to convey the sense of “anesthetic.” The main requirements of an anesthetic are that it have broad action, that is, a significant range between the effective (anesthetic) and toxic doses; that it not produce complications; and that it have no aftereffects.

Anesthetics are classified as either inhalation or noninhalation, depending on the method of administration. Inhalation anesthetics are divided into volatile anesthetics, which include ethers, chloroform, trichloroethylene, halothane, and ethyl chloride, and into gaseous anesthetics, such as nitrous oxide and cyclopropane. Noninhalation anesthetics, for example, hexobarbital, sodium thiopental, and propanilid, are administered intravenously. Narcolan is introduced by rectum.

Often, a combination of anesthetics is used to weaken or completely compensate for any negative properties that one of the ingredients might have when used alone. Surgical procedures that involve certain physiological functions can require a combination of an anesthetic with other types of agents, such as muscle relaxants, antihistamines, cholinergic and adrenergic blocking agents, ganglioplegic agents, neuroleptics, and tranquilizers. A new kind of anesthesia has been developed, neuroleptoanalgesia, in which anesthesia is brought about using neuroleptics and analgesics without the use of anesthetics.


Zakusov, V. V. Farmakologiia nervnoi sistemy. Leningrad, 1953.


What does it mean when you dream about an anesthetic?

To dream of being anaesthetized may represent the residue of a memory (e.g., from a medical operation). It could also reflect a desire to be relieved of some painful experience—physical, mental, or emotional.


A drug, such as ether, that produces loss of sensibility.
References in periodicals archive ?
Five days after the referral of Case #2, Case #3 (see below) who was seen in the outpatient clinic had exactly the same symptoms and signs of Case #2 and was diagnosed as topical anesthetic abuse from the history.
1,2,4] Topical anesthetics are associated with fewer adverse events (AEs) compared with SSRIs, and are applied easily when needed;[sup.
1, 2) Topical anesthetics can decrease the pain sensation via anesthetizing pain nerve endings of intact skin.
A double blind crossover comparison of topical anesthetics.
FDA is concerned about the serious public health risks related to compounded topical anesthetic creams.
Yag laser: A laser treatment performed with a topical anesthetic, useful for toning loose tissue and for shrinking fine blood vessels near the skin's surface.
The topical anesthetic EMLA has been used to reduce pain of circumcision and was found to be effective in studies by Taddio et al.
Menthol, derived from the peppermint plant, is a weak, local topical anesthetic.
While Bioerodible Mucoadhesive systems can deliver small molecules, peptides, proteins and DNA, this formula patent covers a Bioerodible Mucoadhesive composition containing dyclonine-HCl, a topical anesthetic drug for relief of pain including canker sores and minor dental procedures.
The absorbent tip is impregnated with a solution including a topical anesthetic agent and a cleansing solution.