Lethyl Uses

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How do you administer this medicine?
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What is Lethyl?

Lethyl is in a group of drugs called barbiturates (bar-BIT-chur-ates). Lethyl slows the activity of your brain and nervous system.

Lethyl is used to treat or prevent seizures. It is also used short-term to treat insomnia, or as a sedative before surgery.

Lethyl may also be used for purposes not listed in this medication guide.

Lethyl indications

An indication is a term used for the list of condition or symptom or illness for which the medicine is prescribed or used by the patient. For example, acetaminophen or paracetamol is used for fever by the patient, or the doctor prescribes it for a headache or body pains. Now fever, headache and body pains are the indications of paracetamol. A patient should be aware of the indications of medications used for common conditions because they can be taken over the counter in the pharmacy meaning without prescription by the Physician.
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Parenteral

  1. Sedative. Sedation is obtainable within an hour, and in adequate dosage, the duration of action is more than six hours. Included in the more common conditions in which the sedative action of this class of drugs is desired are anxiety-tension states, hyperthyroidism, essential hypertension, nausea and vomiting of functional origin, motion sickness, acute labyrinthitis, pylorospasm in infants, chorea and cardiac failure. Lethyl is also a useful adjunct in treatment of hemorrhage from the respiratory or gastrointestinal tract. Lethyl controls anxiety, decreases muscular activity and lessens nervous excitability in hyperthyroid patients. However, thyrotoxic individuals occasionally react poorly to barbiturates.
  2. Hypnotic, for the short-term treatment of insomnia, since it appears to lose its effectiveness for sleep induction and sleep maintenance after 2 weeks.
  3. Preanesthetic.
  4. Long-term anticonvulsant, (Lethyl, mephobarbital and metharbital) for the treatment of generalized tonic-clonic and cortical focal seizures. And, in the emergency control of certain acute convulsive episodes, e.g., those associated with status epilepticus, cholera, eclampsia, cerebral hemorrhage, meningitis, tetanus, and toxic reactions to strychnine or local anesthetics. Lethyl sodium may be administered intramuscularly or intravenously as an anticonvulsant for emergency use. When administered intravenously, it may require 15 or more minutes before reaching peak concentrations in the brain. Therefore, injecting Lethyl sodium until the convulsions stop may cause the brain level to exceed that required to control the convulsions and lead to severe barbiturate-induced depression.
  5. Lethyl is indicated in pediatric patients as an anticonvulsant and as a sedative, including its preoperative and postoperative use.

How should I use Lethyl?

Use Lethyl as directed by your doctor. Check the label on the medicine for exact dosing instructions.

Ask your health care provider any questions you may have about how to use Lethyl.

Uses of Lethyl in details

There are specific as well as general uses of a drug or medicine. A medicine can be used to prevent a disease, treat a disease over a period or cure a disease. It can also be used to treat the particular symptom of the disease. The drug use depends on the form the patient takes it. It may be more useful in injection form or sometimes in tablet form. The drug can be used for a single troubling symptom or a life-threatening condition. While some medications can be stopped after few days, some drugs need to be continued for prolonged period to get the benefit from it.
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This medication is used alone or with other medications to control seizures. Controlling and reducing seizures lets you do more of your normal daily activities, reduces your risk of harm when you lose consciousness, and lessens your risk for a possibly life-threatening condition of frequent, repeated seizures. Lethyl belongs to a class of drugs known as barbiturate anticonvulsants/hypnotics. It works by controlling the abnormal electrical activity in the brain that occurs during a seizure. This medication is also used for a short time (usually no more than 2 weeks) to help calm you or help you sleep during periods of anxiety. It works by affecting certain parts of the brain to cause calming.

How to use Lethyl

Take this medication by mouth with or without food, usually once daily at bedtime for seizure control, or as directed by your doctor. Take with food or milk if stomach upset occurs. If you are using the liquid form of this medication, measure the dose carefully using a special measuring device/cup. Do not use a household spoon because you may not get the correct dose.

Dosage is based on your medical condition, Lethyl blood levels, and response to treatment. The dosage in children may also be based on weight.

Your doctor may direct you to start this medication at a low dose and gradually increase your dose to prevent side effects such as drowsiness and dizziness. Follow your doctor's instructions carefully. Do not take more or less of this drug than prescribed.

It may take several weeks to reach the best dose for you and completely control your seizures. This medication works best when the amount of drug in your body is kept at a constant level. Therefore, take it at the same time(s) each day.

Do not stop taking this medication (and other anticonvulsant medications) without consulting your doctor. Your seizures may worsen or cause a very severe seizure that is difficult to treat (status epilepticus) when this drug is suddenly stopped.

This medication may cause withdrawal reactions, especially if it has been used regularly for a long time or in high doses. In such cases, withdrawal symptoms (such as anxiety, hallucinations, twitching, trouble sleeping) may occur if you suddenly stop using this medication. Withdrawal from Lethyl can be severe and include seizures and (rarely) death. To prevent withdrawal reactions, your doctor may reduce your dose gradually. Consult your doctor or pharmacist for more details, and report any withdrawal reactions right away.

Along with its benefits, this medication may rarely cause abnormal drug-seeking behavior (addiction). This risk may be increased if you have abused alcohol or drugs in the past. Take this medication exactly as prescribed to lessen the risk of addiction.

When this medication is used for a long time for anxiety or to help you sleep, it may not work as well. Lethyl should only be used for a short time for anxiety or sleep. Talk with your doctor if this medication stops working well.

Tell your doctor if your anxiety or seizure control worsens (such as the number of seizures increases).

Lethyl description

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A barbiturate that is metabolized to Lethyl. It has been used for similar purposes, especially in epilepsy, but there is no evidence mephobarbital offers any advantage over Lethyl.

Lethyl dosage

Suggested doses of Lethyl for specific indications are as follows:

a. Pediatric

Oral Dosage (as recommended by the American Academy of Pediatrics):

b. Adult

Oral

Dosage:

1. Daytime sedative: 30 to 120 mg daily in 2 to 3 divided doses.
2. Bedtime hypnotic: 100 to 320 mg.
3. Anticonvulsant: 50 to 100 mg 2 to 3 times daily.

Dosages of Lethyl must be individualized with full knowledge of their particular characteristics and recommended rate of administration. Factors of consideration are the patient's age, weight, and condition.

Parenteral routes should be used only when oral administration is impossible or impractical.

Anticonvulsant use: A therapeutic anticonvulsant level of Lethyl in serum is 10 to 25 µg/mL. To achieve the blood levels considered therapeutic in children, higher per-kilogram dosages are generally necessary for Lethyl and most other anticonvulsants. In children and infants, Lethyl at loading dose of 15 to 20 mg/kg produces blood levels of about 20 µg/mL shortly after administration.

In status epilepticus, it is imperative to achieve therapeutic blood levels of Lethyl as rapidly as possible. Because a barbiturate-induced depression may occur along with a postictal depression once the seizures are controlled, it is important, therefore, to use the minimal amount required, and to wait for the anticonvulsant effect to develop before administering a second dose.

Lethyl has been used in the treatment and prophylaxis of febrile seizures. However, it has not been established that prevention of febrile seizures influences the subsequent development of epilepsy.

Special patient population: Dosage should be reduced in the elderly or debilitated because these patients may be more sensitive to Lethyl. Dosage should be reduced for patients with impaired renal function or hepatic disease.

How supplied

Oral Tablets

15 mg - Each white round tablet imprinted Þ 026 contains 15 mg of Lethyl. Tablets are supplied in bottles of 1000 (NDC 0228-2026-96).

30 mg - Each white, round, scored tablet imprinted Þ 028 contains 30 mg of Lethyl. Tablets are supplied in bottles of 1000 (NDC 0228-2028-96).

100 mg - Each white, round, scored tablet imprinted Þ 030 contains 100 mg of Lethyl. Tablets are supplied in bottles of 1000 (NDC 0228-2030-96).

Dispense in well-closed containers as defined in the USP. Store at controlled room temperature 15º- 30º C (59º- 86º F).

Oral Elixir

Red, clear elixir contains 20 mg of Lethyl per teaspoon (5 ml). Alcohol 13% by volume. Elixir is supplied in pints (NDC 0228-2024-16).

Preserve and dispense in tight, light- resistant containers as defined in the USP. Store at controlled room temperature 15º- 30ºC (59º- 86º F).

Rx only.

Lethyl interactions

See also:
What other drugs will affect Lethyl?

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Most reports of clinically significant drug interactions occurring with the barbiturates have involved Lethyl.

1. Anticoagulants: Lethyl lowers the plasma levels of dicumarol (name previously used: bishydorxycoumarin) and causes a decrease in anticoagulant activity as measured by the prothrombin time. Lethyl can induce hepatic microsomal enzymes resulting in increased metabolism and decreased anticoagulant response of oral anticoagulants (e.g., warfarin, acenocournarol, dicumarol, and phenprocoumon). Patients stabilized on anticoagulant therapy may require dosage adjustments if Lethyl is added to or withdrawn from their dosage regimen.

2. Corticosteroids: Lethyl appears to enhance the metabolism of exogenous corticosteroids probably through the induction of hepatic microsomal enzymes. Patients stabilized on corticosteroid therapy may require dosage adjustments if Lethyl is added to or withdrawn from their dosage regimen.

3. Griseofulvin: Lethyl appears to interfere with the absorption of orally administered griseofulvin, thus decreasing its blood level. The effect of the resultant decreased blood levels of griseofulvin on therapeutic response has not been established. However, it would be preferable to avoid concomitant administration of these drugs.

4. Doxycycline: Lethyl has been shown to shorten the half- life of doxycycline for as long as 2 weeks after barbiturate therapy is discontinued. This mechanism is probably through the induction of hepatic microsomal enzymes that metabolize the antibiotic. If Lethyl and doxycycline are administered concurrently, the clinical response to doxycycline should be monitored closely.

5. Phenytoin, sodium valproate, valproic acid: The effect of Lethyl on the metabolism of phenytoin appears to be variable. Some investigators report an accelerating effect, while others report no effect. Because the effect of Lethyl on the metabolism of phenytoin is not predictable, phenytoin and Lethyl blood levels should be monitored more frequently if these drugs are given concurrently. Sodium valproate and valproic acid appear to decrease Lethyl metabolism; therefore, Lethyl blood levels should be monitored and appropriate dosage adjustments made as indicated.

6. Central nervous system depressants: The concomitant use of other central nervous system depressants including other sedatives or hypnotics, antihistamines, tranquilizers, or alcohol, may produce additive depressant effects.

7. Monoamine oxidase inhibitors (MAOIs): MAOIs prolong the effects of Lethyl probably because metabolism of the Lethyl is inhibited.

8. Estradiol, estrone, progesterone and other steroidal hormones: Pretreatment with or concurrent administration of Lethyl may decrease the effect of estradiol by increasing its metabolism. There have been reports of patients treated with antiepileptic drugs (e.g., Lethyl) who became pregnant while taking oral contraceptives. An alternate contraceptive method might be suggested to women taking Lethyl.

Lethyl side effects

See also:
What are the possible side effects of Lethyl?

The following adverse reactions and their incidence were compiled from surveillance of thousands of hospitalized patients.

More than 1 in 100 patients:
The most common adverse reaction estimated to occur at a rate of 1 to 3 patients per 100 is:
Less than 1 in 100 patients:
Adverse reactions estimated to occur at a rate of less than 1 in 100 patients listed below, grouped by organ system, and by decreasing order of occurrence are:

DRUG ABUSE AND DEPENDENCE

Lethyl may be habit forming:
Tolerance, psychological dependence, and physical dependence may occur especially following prolonged use of high doses of Lethyl. As tolerance to Lethyl develops, the amount needed to maintain the same level of intoxication increases; tolerance to a fatal dosage, however, does not increase more than two-fold. As this occurs, the margin between an intoxicating dosage and fatal dosage becomes smaller.

Symptoms of acute intoxication with Lethyl include unsteady gait, slurred speech, and sustained nystagmus. Mental signs of chronic intoxication include confusion, poor judgment, irritability, insomnia, and somatic complaints.

Symptoms of Lethyl dependence are similar to those of chronic alcoholism. If an individual appears to be intoxicated with alcohol to a degree that is radically disproportionate to the amount of alcohol in his or her blood, the use of barbiturates should be suspected. The lethal dose of a barbiturate is far less if alcohol is also ingested. The symptoms of Lethyl withdrawal can be severe and may cause death. Minor withdrawal symptoms may appear 8 to 12 hours after the last dose of Lethyl. These symptoms usually appear in the following order: anxiety, muscle twitching, tremor of hands and fingers, progressive weakness, dizziness, distortion in visual perception, nausea, vomiting, insomnia, and orthostatic hypotension. Major withdrawal symptoms (convulsions and delirium) may occur within 16 hours and last up to 5 days after abrupt cessation of this drug. Intensity of withdrawal symptoms gradually declines over a period of approximately 15 days. Individuals susceptible to Lethyl abuse and dependence include alcoholics and opiate abusers, as well as other sedative- hypnotic and amphetamine abusers.

Drug dependence on Lethyl arises from repeated administration of the barbiturate or an agent with barbiturate- like effect on a continuous basis, generally in amounts exceeding therapeutic dose levels. The characteristics of drug dependence on Lethyl include: (a) a strong desire or need to continue taking the drug, (b) a tendency to increase the dose, (c) a psychic dependence on the effects of the drug related to subjective and individual appreciation of those effects, and (d) a physical dependence on the effects of the drug requiring its presence for maintenance of homeostasis and resulting in a definite, characteristic, and self-limited abstinence syndrome when the drug is withdrawn.

Treatment of Lethyl dependence consists of cautious and gradual withdrawal of the drug. One method involves substituting a 30 mg dose of Lethyl for each 100 to 200 mg dose that the patient has been taking. The total daily amount of Lethyl is then administered in 3 to 4 divided doses, not to exceed 600 mg daily. Should signs of withdrawal occur on the first day of treatment, a loading dose of 100 to 200 mg of Lethyl may be administered IM in addition to the oral dose. After stabilization on Lethyl, the total daily dose is decreased by 30 mg a day as long as withdrawal is proceeding smoothly. A modification of this regimen involves initiating treatment at the patient's regular dosage level and decreasing the daily dosage by 10 percent if tolerated by the patient.

Infants physically dependent on Lethyl may be given a lower dose of Lethyl at 3 to 10 mg/kg/day. After withdrawal symptoms (hyperactivity, disturbed sleep, tremors, hyperreflexia) are relieved, the dosage of Lethyl should be gradually decreased and completely withdrawn over a 2-week period.

Lethyl contraindications

See also:
What is the most important information I should know about Lethyl?

Do not use Lethyl if you are pregnant. It could harm the unborn baby. Lethyl may also cause addiction or withdrawal symptoms in a newborn if the mother takes the medication during pregnancy.

Lethyl can make birth control pills less effective. Ask your doctor about using a non-hormone method of birth control (such as a condom, diaphragm, spermicide) to prevent pregnancy while taking Lethyl.

Lethyl may cause a severe allergic reaction. Stop taking Lethyl and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Do not stop using Lethyl without first talking to your doctor, even if you feel better. You may have increased seizures if you stop using Lethyl suddenly. You will need to use less and less before you stop the medication completely.

Some people using this medicine have engaged in activity such as driving, eating, or making phone calls and later having no memory of the activity. If this happens to you, stop taking Lethyl and talk with your doctor about another treatment for your sleep disorder.

Lethyl may be habit-forming and should be used only by the person it was prescribed for. Keep the medication in a secure place where others cannot get to it.



Active ingredient matches for Lethyl:

Phenobarbital in South Africa.


List of Lethyl substitutes (brand and generic names)

Sort by popularity
Unit description / dosage (Manufacturer)Price, USD
Tablet; Oral; Phenobarbital Sodium 100 mg
Luminal / amp 130 mg/1 mL x 5's
Injectable; Injection; Phenobarbital Sodium 130 mg / ml
Tablets; Oral; Phenobarbital Sodium 100 mg
LUMINAL 15MG TABLET 1 strip / 10 tablets each (Bayer Pharmaceuticals Pvt Ltd)$ 1.66
LUMINAL 30 MG TABLET 1 strip / 10 tablets each (Bayer Pharmaceuticals Pvt Ltd)$ 0.06
Luminal 15mg Tablet (Bayer Pharmaceuticals Pvt Ltd)$ 0.17
Luminal 30mg Tablet (Bayer Pharmaceuticals Pvt Ltd)$ 0.01
Tablet; Oral; Phenobarbital Sodium 100 mg
Tablets; Oral; Phenobarbital Sodium 100 mg
Tablet; Oral; Phenobarbital 15 mg
Tablets; Oral; Phenobarbital 15 mg
Tablet; Oral; Phenobarbital 15 mg
Tablets; Oral; Phenobarbital 15 mg
LUMINALETTES 15MG TABLET 1 strip / 10 tablets each (Bayer Pharmaceuticals Pvt Ltd)$ 0.04
Luminalettes 15mg Tablet (Bayer Pharmaceuticals Pvt Ltd)$ 0.00
Tablet; Oral; Phenobarbital 15 mg
Tablets; Oral; Phenobarbital 15 mg

References

  1. PubChem. "phenobarbital". https://pubchem.ncbi.nlm.nih.gov/com... (accessed September 17, 2018).
  2. DrugBank. "phenobarbital". http://www.drugbank.ca/drugs/DB01174 (accessed September 17, 2018).
  3. DTP/NCI. "phenobarbital: The NCI Development Therapeutics Program (DTP) provides services and resources to the academic and private-sector research communities worldwide to facilitate the discovery and development of new cancer therapeutic agents.". https://dtp.cancer.gov/dtpstandard/s... (accessed September 17, 2018).

Reviews

The results of a survey conducted on ndrugs.com for Lethyl are given in detail below. The results of the survey conducted are based on the impressions and views of the website users and consumers taking Lethyl. We implore you to kindly base your medical condition or therapeutic choices on the result or test conducted by a physician or licensed medical practitioners.

User reports

1 consumer reported useful

Was the Lethyl drug useful in terms of decreasing the symptom or the disease?
According to the reports released by ndrugs.com website users, the below mentioned percentages of users say the drug is useful / not useful to them in decreasing their symptoms/disease. The usefulness of the drug depends on many factors, like severity of the disease, perception of symptom, or disease by the patient, brand name used [matters only to a certain extent], other associated conditions of the patient. If the drug is not effective or useful in your case, you need to meet the doctor to get re-evaluated about your symptoms/disease, and he will prescribe an alternative drug.
Users%
Useful1
100.0%


Consumer reported price estimates

No survey data has been collected yet


2 consumers reported time for results

To what extent do I have to use Lethyl before I begin to see changes in my health conditions?
As part of the reports released by ndrugs.com website users, it takes 1 day and a few days before you notice an improvement in your health conditions.
Please note, it doesn't mean you will start to notice such health improvement in the same time frame as other users. There are many factors to consider, and we implore you to visit your doctor to know how long before you can see improvements in your health while taking Lethyl. To get the time effectiveness of using Lethyl drug by other patients, please click here.
Users%
1 day1
50.0%
1 week1
50.0%


4 consumers reported age

Users%
> 602
50.0%
30-451
25.0%
6-151
25.0%


Consumer reviews


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Information checked by Dr. Sachin Kumar, MD Pharmacology

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