Anesthetic

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anaesthetic

(US), anesthetic
a substance that causes anaesthesia

Anesthetic

 

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.

REFERENCE

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

V. V. PARIN

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.

anesthetic

[¦an·əs¦thed·ik]
(pharmacology)
A drug, such as ether, that produces loss of sensibility.
References in periodicals archive ?
Few studies have added the longacting amino ester tetracaine to a long-acting amino amide such as bupivacaine to prolong anesthesia and analgesia.
The local anesthetics available for ophthalmic use are lidocaine (Akten), propara-caine (Alcaine, Ophrhetic, Paracaine), proparacaine combined with fluorescein (Flucaine, Fluoracaine, Flurate, Fluress, Flurox), and tetracaine (Altacaine, Tetcaine).
Allergic reactions are uncommon with lidocaine, but they may be more prevalent with the esters such as tetracaine and benzocaine.
Synera is a topical patch that combines lidocaine, tetracaine and heat, approved in the United States to provide local dermal analgesia for superficial venous access and superficial dermatological procedures and in Europe, for surface anaesthesia of normal intact skin.
The local anesthesia was delivered through tampons of tetracaine and xylometazoline 0.
Active ingredients in BLT numbing cream from the Santa Monica pharmacy include benzocaine, lidocaine, and tetracaine - anesthetics that have been used to provide a soothing, comfortable effect for years in prescription and over-the-counter products alike.
In 1979 Fox, Villanueva and Schutta reported the first case of myoclonus after spinal anaesthesia with tetracaine (1).
Profound is a topical anesthetic gel made from a combination of tetracaine, lidocaine and prilocaine.
About Synera (lidocaine and tetracaine) Topical Patch SYNERA is a prescription patch that contains a mixture of lidocaine, tetracaine, and a gentle warming technology that helps prevent pain associated with superficial venous access and superficial dermatological procedures.
A solution of tetracaine base ranging from 8 to 32% is mixed by adding 80 to 320 mg of tetracaine base powder to I cc of isopropyl alcohol.
Another method is to use drops of a fresh mixture of 180 mg of topical tetracaine base powder with 0.