Phenobarbital Health Dictionary

DC.

Synonym: N. grandiflora DC.

Family: Valerianaceae.

Habitat: Alpine Himalayas, Kumaon, Sikkim and Bhutan.

English: Spikenard, Musk-root.

Ayurvedic: Maansi, Jataamaansi, Bhuutajataa, Tapaswini, Sulo- mashaa, Jatilaa, Naladaa.

Unani: Sumbul-e-Hindi, Sambul-ut- Teeb, Naardeen-e-Hindi, Baalchhar.

Siddha/Tamil: Sadamanchil.

Action: Used as a substitute for Valerian. Tranquilizer, sedative, hypotensive. Used for the treatment of epilepsy, hysteria, convulsive affections, palpitation of heart and in intestinal colic. A decoction of powdered roots is prescribed as a home remedy for high blood pressure. It is used in dysmenorrhoea for pain relief and smooth menstrual flow. It is used in hair oil for arresting hair loss and greying of hair.

The Ayurvedic Pharmacopoeia of India recommends dry rhizomes in obstinate skin diseases, erysipelas, disturbed mental state and insomnia.

The rhizome is rich in sesquiter- penoids. The crude drug gave an oil (yield 2.5% v/w), which contains d- nardostachone, valeranone and jata- mansone as the major ketonic sesqui- terpenes. The oil potentiated phenobarbital narcosis in rats, reduced brain serotonin content and decreased the conditioned avoidance performance in cats.

Jatamansone was shown to exert tranquilizing effect in mice and monkeys. In rabbits, jatamansone was found to impair biosynthesis of serotonin in the brain leading to a reduction in brain level of 5-hydroxytrypta- mine. The degradation of serotonin was unaffected. The mode of action of jatamansone was thus in variance with that of reserpine which has direct action on the cell to liberate serotonin.

On the other hand, the alcoholic extract of the roots of Indian Nard caused an overall increase in the levels of central monamines, 5-hydroxy indole acetic acid and the inhibitory amino acids, gamma-aminobutyric acid, norepinephrine, dopamine and serotonin in rat brain.

In a clinical trial on hyperkinetic children, jatamansone showed significant reduction in hyperactivity and improvement in restlessness and aggressiveness, almost at par with D- amphetamine.

The volatile oil was found to be less active than quinidine in several tests. It did not counteract digitalis induced ventricular arrhythmias.

Jatamansone semicarbazone, a sesquiterpene ketone, was found to possess antiestrogenic activity.

N. jatamansi is also used in place of Muraa (Selinum tenuifolium Wall. ex DC.)

Dosage: Root—2-3 g powder; 5-10 g for infusion; 50-100 ml infusion. (API, Vol. I; CCRAS.)... nardostachys jatamansi

A group of sedative drugs that work by depressing activity within the brain. They include thiopental and phenobarbital. In the past, barbiturates were widely used as antianxiety drugs and sleeping drugs but have been largely replaced by benzodiazepine drugs and other nonbarbiturates. Barbiturates are now strictly controlled because they are habit-forming and widely abused. An overdose can be fatal, particularly in combination with alcohol, which dangerously increases the depressant effect on the brain (including suppression of the respiratory centre). However, phenobarbital is still commonly used as an anticonvulsant drug in the treatment of epilepsy. Thiopental is very short acting and is used to induce anaesthesia (see anaesthesia, general).... barbiturate drugs

n. a drug that prevents or reduces the severity and frequency of seizures in various types of epilepsy; the term antiepileptic drug is now preferred since not all epileptic seizures involve convulsions. The choice of drug is dictated by the type of seizure and the patient’s response, and the dosage must be adjusted carefully as individuals vary in their response to these drugs and side-effects may be troublesome. Commonly used antiepileptic drugs include *carbamazepine, *lamotrigine, *phenytoin, *sodium valproate, levetiracetem, topiramate, *gabapentin, pregabalin, and oxcarbazepine. Phenobarbital is no longer commonly prescribed.

Certain anticonvulsants have shown efficacy in treating bipolar disorder and chronic pain, as in postherpetic neuralgia or *peripheral neuropathy, and can be used to prevent migraine and other primary headache syndromes.... anticonvulsant

n. any of a group of drugs, derived from barbituric acid, that depress activity of the central nervous system and were formerly widely used as sedatives and hypnotics. They are classified into three groups according to their duration of action – short, intermediate, and long. Because they produce *tolerance and psychological and physical *dependence, have serious toxic side-effects (see barbiturism), and can be fatal following large overdosage, barbiturates have been largely replaced in clinical use by safer drugs. The main exception is the very short-acting drug *thiopental, which is used to induce anaesthesia. See also amobarbital; butobarbital; phenobarbital.... barbiturate