Toremifene Citrate
Generic Name: toremifene citrate
Brand Names:
Toremifene Citrate
11 DESCRIPTION Toremifene citrate tablets for oral administration each contain 88.5 mg of toremifene citrate, which is equivalent to 60 mg toremifene. Toremifene citrate tablets are estrogen agonist/antagonist. The chemical name of toremifene is: 2-{p-[(Z)-4-chloro-1,2-diphenyl-1-butenyl]phenoxy}-N,N-dimethylethylamine citrate(1:1).The structural formula is: and the molecular formula is C 26 H 28 ClNO . C 6 H 8 O 7 . The molecular weight of toremifene citrate is 598.10. The pK a is 7.76.
Overview
11 DESCRIPTION Toremifene citrate tablets for oral administration each contain 88.5 mg of toremifene citrate, which is equivalent to 60 mg toremifene. Toremifene citrate tablets are estrogen agonist/antagonist. The chemical name of toremifene is: 2-{p-[(Z)-4-chloro-1,2-diphenyl-1-butenyl]phenoxy}-N,N-dimethylethylamine citrate(1:1).The structural formula is: and the molecular formula is C 26 H 28 ClNO . C 6 H 8 O 7 . The molecular weight of toremifene citrate is 598.10. The pK a is 7.76.
Uses
1 INDICATIONS AND USAGE Toremifene citrate tablets are estrogen agonist/antagonist indicated for the treatment of metastatic breast cancer in postmenopausal women with estrogen-receptor positive or unknown tumors. Toremifene citrate tablets are estrogen agonist/antagonist indicated for the treatment of metastatic breast cancer in postmenopausal women with estrogen-receptor positive or unknown tumors.
Dosage
2 DOSAGE AND ADMINISTRATION The dosage of toremifene citrate tablets are 60 mg, once daily, orally. Treatment is generally continued until disease progression is observed. 60 mg once daily, orally (2)
Side Effects
6 ADVERSE REACTIONS Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Most common adverse reactions are hot flashes, sweating, nausea and vaginal discharge. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Novadoz Pharmaceuticals LLC at 1-855-668-2369 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Adverse drug reactions are principally due to the antiestrogenic actions of toremifene citrate and typically occur at the beginning of treatment.
Interactions
7 DRUG INTERACTIONS Drugs that decrease renal calcium excretion, e.g., thiazide diuretics, may increase the risk of hypercalcemia in patients receiving toremifene citrate. (7.1) Agents that prolong QT should be avoided. (7.2) Coadministration with a strong CYP3A4 inducer may result in a relevant decrease in toremifene citrate exposure and should be avoided. (7.3) Coadministration with a strong CYP3A4 inhibitor can result in a relevant increase in toremifene citrate exposure and should be avoided. (7.4) CYP2C9 substrates with a narrow therapeutic index such as warfarin or phenytoin with toremifene citrate should be used with caution and require careful monitoring.
Warnings
WARNING: QT PROLONGATION Toremifene citrate has been shown to prolong the QTc interval in a dose- and concentration-related manner [see Clinical Pharmacology (12.2)]. Prolongation of the QT interval can result in a type of ventricular tachycardia called Torsade de pointes, which may result in syncope, seizure, and/or death. Toremifene should not be prescribed to patients with congenital/acquired QT prolongation, uncorrected hypokalemia or uncorrected hypomagnesemia. 5 WARNINGS AND PRECAUTIONS Prolongation of the QT Interval (5.1) Heptatotoxicty (5.2) Hypercalcemia and Tumor Flare (5.3) Risk of Uterine Malignancy (5.4) General (5.5) Laboratory Tests ( 5.6) Pregnancy: Fetal harm may occur when administered to a pregnant woman. Women should be advised not to become pregnant when taking toremifene citrate. ( 5.7 , 8.1 ) Women of Childbearing Potential: Use effective nonhormonal contraception during toremifene citrate therapy. (5.8) 5.1 Prolongation of the QT Interval Toremifene has been shown to prolong the QTc interval in a dose- and concentration-related manner [see Clinical Pharmacology (12.2)] . 4 CONTRAINDICATIONS Hypersensitivity to the drug (4.1) QT Prolongation, Hypokalemia, Hypomagnesemia (4.2) 4.1 Hypersensitivity to the Drug Toremifene citrate is contraindicated in patients with known hypersensitivity to the drug.
Pregnancy
8.1 Pregnancy Pregnancy Category D [ see Warnings and Precautions (5.6).] Based on its mechanism of action in humans and findings of increased pregnancy loss and fetal malformation in animal studies, toremifene citrate can cause fetal harm when administered to a pregnant woman. Toremifene caused embryo-fetal toxicities at maternal doses that were lower than the 60 mg daily recommended human dose on a mg/m 2 basis. There are no adequate and well-controlled studies in pregnant women using toremifene citrate.
Storage
16 SUPPLIED/STORAGE AND HANDLING Toremifene citrate tablets, containing toremifene citrate in an amount equivalent to 60 mg of toremifene, are white to off white colored, round shaped, uncoated tablets, debossed with “MT” on one side and plain on other side and free from physical defects. Toremifene citrate tablets are available as: NDC 72205-050-30 bottles of 30 Store at 25°C (77°F).
Frequently Asked Questions
What is Toremifene Citrate used for?▼
1 INDICATIONS AND USAGE Toremifene citrate tablets are estrogen agonist/antagonist indicated for the treatment of metastatic breast cancer in postmenopausal women with estrogen-receptor positive or unknown tumors. Toremifene citrate tablets are estrogen agonist/antagonist indicated for the treatment of metastatic breast cancer in postmenopausal women with estrogen-receptor positive or unknown tumors.
What are the side effects of Toremifene Citrate?▼
6 ADVERSE REACTIONS Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Most common adverse reactions are hot flashes, sweating, nausea and vaginal discharge. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Novadoz Pharmaceuticals LLC at 1-855-668-2369 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Adverse drug reactions are principally due to the antiestrogenic actions of toremifene citrate and typically occur at the beginning of treatment.
Can I take Toremifene Citrate during pregnancy?▼
8.1 Pregnancy Pregnancy Category D [ see Warnings and Precautions (5.6).] Based on its mechanism of action in humans and findings of increased pregnancy loss and fetal malformation in animal studies, toremifene citrate can cause fetal harm when administered to a pregnant woman. Toremifene caused embryo-fetal toxicities at maternal doses that were lower than the 60 mg daily recommended human dose on a mg/m 2 basis. There are no adequate and well-controlled studies in pregnant women using toremifene citrate.
What are the important warnings for Toremifene Citrate?▼
WARNING: QT PROLONGATION Toremifene citrate has been shown to prolong the QTc interval in a dose- and concentration-related manner [see Clinical Pharmacology (12.2)]. Prolongation of the QT interval can result in a type of ventricular tachycardia called Torsade de pointes, which may result in syncope, seizure, and/or death. Toremifene should not be prescribed to patients with congenital/acquired QT prolongation, uncorrected hypokalemia or uncorrected hypomagnesemia. 5 WARNINGS AND PRECAUTIONS Prolongation of the QT Interval (5.1) Heptatotoxicty (5.2) Hypercalcemia and Tumor Flare (5.3) Risk of Uterine Malignancy (5.4) General (5.5) Laboratory Tests ( 5.6) Pregnancy: Fetal harm may occur when administered to a pregnant woman. Women should be advised not to become pregnant when taking toremifene citrate. ( 5.7 , 8.1 ) Women of Childbearing Potential: Use effective nonhormonal contraception during toremifene citrate therapy. (5.8) 5.1 Prolongation of the QT Interval Toremifene has been shown to prolong the QTc interval in a dose- and concentration-related manner [see Clinical Pharmacology (12.2)] . 4 CONTRAINDICATIONS Hypersensitivity to the drug (4.1) QT Prolongation, Hypokalemia, Hypomagnesemia (4.2) 4.1 Hypersensitivity to the Drug Toremifene citrate is contraindicated in patients with known hypersensitivity to the drug.
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Medical Disclaimer
This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.