Thiethylperazine (Torecan)
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Thiethylperazine (Torecan)

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Torecan®
(thiethylperazine maleate) Tablets
(thiethylperazine maleate) for Injection, USP
For Intramuscular Use Only

DRUG DESCRIPTION

TORECAN (thiethylperazine) is a phenothiazine. Thiethylperazine is characterized by a substituted thioethyl group at position 2 in the phenothiazine nucleus, and a piperazine moiety in the side chain. The chemical designation is: 2-ethyl-mercapto-10-[3 †- (1 †-methyl-piperazinyl-4†)-propyl-1] phenothiazine.

Tablet, 10 mg, for oral administration

Active Ingredient: thiethylperazine maleate USP, 10 mg.

Inactive Ingredients: acacia, carnauba wax, FD&C Yellow No.5 aluminum lake (tartrazine), FD&C Yellow No.6 aluminum lake, gelatin, lactose, magnesium stearate, povidone, sodium benzoate, sorbitol, starch, stearic acid, sucrose, talc, titanium dioxide.

Ampul, 2 ml, for intramuscular administration

Active Ingredient: thiethylperazine malate USP, 10 mg per 2 mL.

Inactive Ingredients: sodium metabisulfite NF, 0.5 mg; ascorbic acid USP, 2.0 mg; sorbitol NF, 40 mg; carbon dioxide gas q.s.; water for injection USP, q.s.to 2 mL.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

INDICATIONS

TORECAN (thiethylperazine) is indicated for the relief of nausea and vomiting.

DOSAGE AND ADMINISTRATION

Adult

Usual daily dose range is 10 mg to 30 mg.

Oral: One tablet, one to three times daily.

Intramuscular: 2 mL IM, one to three times daily. (See PRECAUTIONS.)

Pediatric Patients

Appropriate dosage of TORECAN (thiethylperazine) has not been determined in pediatric patients.

HOW SUPPLIED

Torecan (thiethylperazine maleate) Tablets, USP

    10mg Each tablet contains 10 mg thiethylperazine maleate, USP.
    Bottles of 100 tablets (NDC 0054-4748-25).

Storage: Below 86°F (30°C). Dispense in tight, light-resistant container as defined in the USP/NE

Torecan (thiethylperazine malate) Injection, USP

    2 mL Ampul

Each 2 mL ampul contains aqueous solution 10 mg thiethylperazine malate, USP.
Boxes of 20 ampuls (NDC 0054-1701-07).
Boxes of 100 ampuls (NDC 0054-1701-25).

Storage: Below 86°F (30°C); protect from light. Administer only if clear and colorless.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

SIDE EFFECTS

Central Nervous System

Serious: Convulsions have been reported. Extrapyramidal symptoms (E.P.S.) may occur, such as dystonia, torticoilis, oculogyric crises, akathisia and gait disturbances. Others: Occasional cases of dizziness, headache, fever and restlessness have been reported.

Drowsiness may occur on occasion, following an initial injection. Generally this effect tends to subside with continued therapy or is usually alleviated by a reduction in dosage.

Autonomic Nervous System

Dryness of the mouth and nose, blurred vision, tinnitus. An occasional case of sialorrhea together with altered gustatory sensation has been observed.

Endocrine System

Peripheral edema of the arms, hands and face.

Hepatotoxicity

An occasional case of cholestatic jaundice has been observed.

Other

An occasional case of cerebral vascular spasm and trigeminal neuralgia has been reported.

Phenothiazine Derivatives

The physician should be aware that the following have occurred with one or more phenothiazines and should be considered whenever one of these drugs is used:

Blood Dyscrasias: Serious - Agranulocytosis, leukopenia, thrombocytopenia, aplastic anemia, pancytopenia. Other: Eosinophilia, leukocytosis.

Autonomic Reactions: Miosis, obstipation, anorexia, paralytic ileus.

Cutaneous Reactions: Serious - Erytherna, exfoliative dermatitis, contact dermatitis.

Hepatotoxicity: Serious - Jaundice, biliary stasis.

Cardiovascular Effects: Serious - Hypotension, rarely leading to cardiac arrest; electrocardiographic (ECG) changes.

Extrapyramidal Symptoms: Serious - Akathisia, agitation, motor restlessness, dystonic reactions, trismus, torticollis, opisthotonos, oculogyric crises, tremor, muscular rigidity, akinesia - some of which have persisted for several months or years especially in patients of advanced age with brain damage.

Endocrine Disturbances: Menstrual irregularities, altered libido, gynecomastia, weight gain. False positive pregnancy tests have been reported.

Urinary Disturbances: Retention, incontinence.

Allergic Reactions: Serious - Fever, laryngeal edema, angioneurotic edema, asthma.

Others: Hyperpyrexia. Behavioral effects suggestive of a paradoxical reaction have been reported. These include excitement, bizarre dreams, aggravation of psychoses and toxic confusional states. While there is no evidence at present that ECG changes observed in patients receiving phenothiazines are in any way precursors of any significant disturbance of cardiac rhythm, it should be noted that sudden and unexpected deaths apparently due to cardiac arrest have been reported in a few instances in hospitalized psychotic patients previously showing characteristic ECG changes. A peculiar skin-eye syndrome has also been recognized as a side effect following long-term treatment with certain phenothiazines. This reaction is marked by progressive pigmentation of areas of the skin or conjunctiva and/or accompanied by discoloration of the exposed sclera and cornea. Opacities of the anterior lens and cornea described as irregular or stellate in shape have also been reported.

DRUG ABUSE AND DEPENDENCE

TORECAN (thiethylperazine) is not a controlled substance.

Read the Torecan (thiethylperazine) Side Effects Center for a complete guide to possible side effects »

DRUG INTERACTIONS

Phenothiazines are capable of potentiating CNS depressants (e.g., barbiturates, anesthetics, opiates, alcohol, etc.) as well as atropine and phosphorous insecticides.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

WARNINGS

TORECAN (thiethylperazine) Injection contains sodium metabisulfite, a sulfite that may cause allergic-type reactions including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than in nonasthmatic people.

Phenothiazines are capable of potentiating CNS depressants (e.g., barbiturates, anesthetics, opiates, alcohol, etc.) as well as atropine and phosphorous insecticides.

Since TORECAN (thiethylperazine) may impair mental and/or physical ability required in the performance of potentially hazardous tasks such as driving a car or operating machinery, it is recommended that patients be warned accordingly.

Postoperative Nausea and Vomiting

With the use of this drug to control postoperative nausea and vomiting occurring in patients undergoing elective surgical procedures, restlessness and postoperative CNS depression during anesthesia recovery may occur. Possible postoperative complications of a severe degree of any of the known reactions of this class of drug must be considered. Postural hypotension may occur after an initial injection, rarely with the tablet.

The administration of epinephrine should be avoided in the treatment of drug-induced hypotension in view of the fact that phenothiazines may induce a reversed epinephrine effect on occasion.

Should a vasoconstrictive agent be required, the most suitable are norepinephrifle bitartrate and phenylephrine.

The use of this drug has not been studied following intracardiac and intracranial surgery.

PRECAUTIONS

Abnormal movements such as extrapyramidal symptoms (E.P.S.) (e.g., dystonia, torticollis, dysphasia, oculogyric crises, akathisia) have occurred. Convulsions have also been reported. The varied symptom complex is more likely to occur in young adults and children. Extrapyramidal effects must be treated by reduction of dosage or cessation of medication.

TORECAN (thiethylperazine) tablets contain FD&C Yellow No. 5 (tartrazine) which may cause allergic-type reactions (including bronchial asthma) in certain susceptible individuals. Although the overall incidence of FD&C Yellow No. 5 (tartrazine) sensitivity in the general population is low, it is frequently seen in patients who also have aspirin hypersensitivity.

Use in patients with bone marrow depression only when potential benefits outweigh risks.

Neuroleptic Malignant Syndrome (NMS), a potentially fatal symptom complex, has been reported in association with phenothiazine drugs. Clinical manifestations include: hyperpyrexia, muscle rigidity, altered mental status and evidence of autonomic instability.

The extrapyramidal symptoms which can occur secondary to TORECAN (thiethylperazine) may be confused with the central nervous system signs of an undiagnosed primary disease responsible for the vomiting, e.g., Reye†s Syndrome or other encephalopathy. The use of TORECAN (thiethylperazine) and other potential hepatotoxins should be avoided in children and adolescents whose signs and symptoms suggest Reye†s Syndrome.

Phenothiazine drugs may cause elevated prolactin levels that persist during chronic administration. Since approximately one-third of human breast cancers are prolactin-dependent in vitro, this elevation is of potential importance if phenothiazine drug administration is contemplated in a patient with a previously-detected breast cancer. Neither clinical nor epidemiologic studies to date, however, have shown an association between the chronic administration of phenothiazine drugs and mammary tumorigenesis.

Postoperative Nausea and Vomiting

When used in the treatment of nausea and/or vomiting associated with anesthesia and surgery, it is recommended that TORECAN (thiethylperazine) should be administered by deep intramuscular injection at or shortly before the termination of anesthesia.

Information for Patients

Patients receiving TORECAN (thiethylperazine) should be cautioned about possible combined effects with alcohol and other CNS depressants. Patients should be cautioned not to operate machinery or drive a motor vehicle after ingesting the drug.

Drug Interactions

Phenothiazines are capable of potentiating CNS depressants (e.g., barbiturates, anesthetics, opiates, alcohol, etc.) as well as atropine and phosphorous insecticides.

Laboratory Test Interactions

The usual precautions should be observed in patients with impaired renal or hepatic function.

Nursing Mothers

Information is not available concerning the excretion of TORECAN (thiethylperazine) in the milk of nursing mothers. As a general rule, nursing should not be undertaken while the patient is on a drug, since many drugs are excreted in human milk.

Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

OVERDOSE

Manifestations of acute overdosage of TORECAN (thiethylperazine) can be expected to reflect the CNS effects of the drug and include extrapyramidal symptoms (E.P.S), confusion and convulsions with reduced or absent reflexes, respiratory depression and hypotension. If the patient is conscious, vomiting should be induced mechanically or with emetics. Gastric lavage should be employed utilizing concurrently a cuffed endotracheal t.b. if the patient is unconscious to prevent aspiration and pulmonary complications. Maintenance of adequate pulmonary ventilation is essential. The use of pressor agents intravenously may be necessary to combat hypotension. The administration of epinephrine should be avoided since phenothiazines may induce a reversed epinephrine effect. The most suitable vasoconstrictive agents are norepinephrine and phenylephrine. Fluids should be administered intravenously to encourage diuresis. The value of dialysis has not been determined. If excitation occurs, barbiturates should not be used. It should be borne in mind that multiple agents may have been ingested.

CONTRAINDICATIONS

Severe central nervous system (CNS) depression and comatose states. Use of TORECAN (thiethylperazine) is contraindicated in patients who have demonstrated a hypersensitivity reaction (e.g., blood dyscrasias, jaundice) to phenothiazines.

Because severe hypotension has been reported after the intravenous administration of phenothiazines, this route of administration is contraindicated.

Usage in Pregnancy

TORECAN (thiethylperazine) is contraindicated in pregnancy.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

CLINICAL PHARMACOLOGY

ACTIONS

The pharmacodynamic action of TORECAN® (thiethylperazine) in humans is unknown. However, a direct action of TORECAN (thiethylperazine) on both the CTZ and the vomiting center may be concluded from induced vomiting experiments in animals.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

PATIENT INFORMATION

Patients receiving TORECAN (thiethylperazine) should be cautioned about possible combined effects with alcohol and other CNS depressants. Patients should be cautioned not to operate machinery or drive a motor vehicle after ingesting the drug.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

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Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

PATIENT INFORMATION

Patients receiving TORECAN (thiethylperazine) should be cautioned about possible combined effects with alcohol and other CNS depressants. Patients should be cautioned not to operate machinery or drive a motor vehicle after ingesting the drug.

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Torecan Patient Information Including Side Effects

Brand Names: Torecan

Generic Name: thiethylperazine (Pronunciation: thye eh thill PEAR a zeen)

What is thiethylperazine (Torecan)?

Thiethylperazine is in a class of drugs called phenothiazines.

Thiethylperazine is used to relieve nausea and vomiting.

Thiethylperazine may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of thiethylperazine (Torecan)?

If you experience any of the following serious side effects, stop taking thiethylperazine and seek emergency medical attention or contact your doctor immediately:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • uncontrollable movements of the mouth, tongue, cheeks, jaw, arms, or legs;
  • confusion; or
  • yellowing of the skin or eyes.

Other, less serious side effects may be more likely to occur. Continue to take thiethylperazine and talk to your doctor if you experience

  • headache, dizziness, or drowsiness;
  • agitation, weakness, or tremor (shaking);
  • an increased heart rate;
  • constipation; or
  • dry mouth.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Read the Torecan (thiethylperazine) Side Effects Center for a complete guide to possible side effects »

What is the most important information I should know about thiethylperazine (Torecan)?

Call your doctor immediately if you experience uncontrollable movements of the mouth, tongue, cheeks, jaw, arms or legs.

Use caution when driving, operating machinery, or performing other hazardous activities. Thiethylperazine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities.

Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while taking thiethylperazine.

Do not take thiethylperazine with other drugs that cause drowsiness, including antidepressants, antihistamines, sedatives (used to treat insomnia), pain relievers, anxiety medicines, and muscle relaxants, except under the direction of your doctor.

Side Effects Centers

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Torecan Patient Information including How Should I Take

What should I discuss with my healthcare provider before taking thiethylperazine (Torecan)?

Before taking this medication, tell your doctor if you have

  • liver disease or other problems with your liver;
  • kidney disease;
  • heart disease or other heart problems such as high blood pressure, low blood pressure, a previous heart attack, irregular heartbeats, or other conditions;
  • seizures or epilepsy;
  • an enlarged prostate or difficulty urinating; or
  • glaucoma.

You may not be able to take thiethylperazine, or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above.

It is not known whether thiethylperazine will be harmful to an unborn baby. Do not take this medication without first talking to your doctor if you are pregnant or could become pregnant.

It is not known whether thiethylperazine passes into breast milk and how it might affect a nursing infant. Do not take thiethylperazine without first talking to your doctor if you are breast-feeding a baby.

Thiethylperazine is not recommended for use by children younger than 12 years of age.

If you are over 60 years of age, you may be more likely to experience side effects from thiethylperazine. Your doctor may prescribe a lower dose of this medication.

How should I take thiethylperazine (Torecan)?

Take thiethylperazine exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse or doctor to explain them to you.

Take each dose with a full glass of water.

Thiethylperazine is usually taken several times a day. Follow your doctor's instructions.

Store thiethylperazine tablets at room temperature away from moisture and heat.

Side Effects Centers

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Torecan Patient Information including If I Miss a Dose

What happens if I miss a dose (Torecan)?

Take the missed dose as soon as you remember. However, if it is almost time for the next dose, skip the missed dose and take only the next regularly scheduled dose. Do not take a double dose of this medication unless otherwise directed by your doctor.

What happens if I overdose (Torecan)?

Seek emergency medical attention.

Symptoms of a thiethylperazine overdose include drowsiness, deep sleep, agitation, restlessness, seizures or convulsions, fever, coma, and death.

What should I avoid while taking thiethylperazine (Torecan)?

Use caution when driving, operating machinery, or performing other hazardous activities. Thiethylperazine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities.

Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while taking thiethylperazine.

Do not take thiethylperazine with other drugs that cause drowsiness, including antidepressants, antihistamines, sedatives (used to treat insomnia), pain relievers, anxiety medicines, and muscle relaxants, unless your doctor approves.

What other drugs will affect thiethylperazine (Torecan)?

Thiethylperazine may increase the side effects of other drugs that cause drowsiness, including antidepressants, alcohol, antihistamines, sedatives (used to treat insomnia), pain relievers, anxiety medicines, and muscle relaxants. Tell your doctor about all medicines that you are taking, and do not take any medicine without first talking to your doctor.

Drugs other than those listed here may also interact with thiethylperazine. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including herbal products.

Where can I get more information?

Your pharmacist has more information about thiethylperazine written for health professionals that you may read.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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