Active Substance: temsirolimus
Common Name: temsirolimus
ATC Code: L01XE09
Marketing Authorisation Holder: Pfizer Limited
Active Substance: temsirolimus
Authorisation Date: 2007-11-19
Therapeutic Area: Carcinoma, Renal Cell Lymphoma, Mantle-Cell
Pharmacotherapeutic Group: Antineoplastic agents
Torisel is indicated for the first-line treatment of adult patients with advanced renal-cell carcinoma (RCC) who have at least three of six prognostic risk factors.
Torisel is indicated for the treatment of adult patients with relapsed and / or refractory mantle-cell lymphoma (MCL).
What is Torisel and what is it used for?
Torisel is a medicine used to treat patients with the following types of cancer:
- advanced renal cell carcinoma (a kidney cancer). ‘Advanced’ means that the cancer has started to spread;
- mantle cell lymphoma (a cancer of B cells, a type of white blood cell). Torisel is used in adults when the lymphoma has come back after previous treatment or if other treatments have not worked.
Because the numbers of patients with renal cell carcinoma and mantle cell lymphoma are low, the diseases are considered ‘rare’, and Torisel was designated an ‘orphan medicine’ (a medicine used in rare diseases) on 6 April 2006 (for renal cell carcinoma) and on 6 November 2006 (for mantle cell lymphoma).
Torisel contains the active substance temsirolimus.
How is Torisel used?
Torisel must be given under the supervision of a doctor who has experience in the use of cancer medicines. The medicine can only be obtained with a prescription.
Torisel is available as a concentrate and solvent that are made up into a solution for infusion (drip) into a vein. It is given as an infusion lasting 30 to 60 minutes. For renal cell carcinoma, the recommended dose of Torisel is 25 mg once a week, but a 10‑mg dose is recommended in patients with severe liver problems who have high levels of platelets in the blood. For mantle cell lymphoma, the recommended dose is 175 mg once a week for three weeks, followed by weekly doses of 75 mg.
Patients are given an antihistamine injection to prevent an allergic reaction around 30 minutes before each dose of Torisel. Treatment with Torisel should continue until the medicine is no longer working or causes unacceptable side effects. Some side effects can be managed by interrupting treatment or reducing the dose.
How does Torisel work?
The active substance in Torisel, temsirolimus, is a cancer medicine, which blocks a protein called ‘mammalian target of rapamycin’ (mTOR). In the body, temsirolimus attaches to a protein inside cells to make a ‘complex’. This complex then blocks mTOR. Since mTOR is involved in the control of cell division, Torisel prevents the division of cancer cells, slowing down the growth and spread of the cancer.
What benefit of Torisel have been shown in studies?
In advanced renal cell carcinoma, a main study involving 626 patients with poor prognosis found Torisel more effective than interferon alfa (another medicine used in the treatment of cancer) at prolonging patients’ survival. Patients were treated with 25 mg Torisel, with interferon alfa or with 15 mg Torisel in combination with interferon alfa. Patients receiving Torisel alone survived 10.9 months on average compared with 7.3 months in those receiving interferon alfa alone. Patients receiving the lower dose of Torisel in combination with interferon alfa survived for a similar time (8.4 months) as those taking interferon alfa alone.
In mantle cell lymphoma, Torisel was found more effective than alternative cancer medicines (such as gemcitabine or fludarabine) in a main study involving 162 patients whose disease had come back after previous treatment or in whom other treatments had not worked. Each patient received one of two doses of Torisel or the most appropriate alternative cancer medicines chosen by the investigator. The main measure of effectiveness was how long patients lived without the disease getting worse. Patients receiving Torisel lived for 4.8 months on average without their disease getting worse compared with 1.9 months in those receiving the alternative treatment.
What are the risks associated with Torisel?
The most common side effects with Torisel (which may affect more than 1 in 5 patients) include infections, pneumonia (infection of the lungs), thrombocytopenia (low blood platelet counts), anaemia (low red blood cell counts), decreased appetite, hyperglycaemia (high blood sugar levels), hypercholesterolaemia (high blood cholesterol levels), dysgeusia (taste disturbances), difficulty breathing, nose bleeds, cough, vomiting, stomatitis (inflammation of the lining of the mouth), diarrhoea, nausea (feeling sick), rash, pruritus (itching), oedema (swelling), tiredness, weakness, fever and mucosal inflammation (inflammation of moist body surfaces).
The most serious side effects of Torisel are allergic (hypersensitivity) reactions, serious reactions that occur during the infusion or soon afterwards, infections, lung disorders including pneumonitis (inflammation of the lungs) and pulmonary embolism (blood clot in the lung), bleeding in the brain, kidney failure, tearing (perforation) of the intestine, complications affecting the healing of wounds, hyperglycaemia (high blood sugar), thrombocytopenia (low levels of platelets), neutropenia (low levels of neutrophils, a type of white blood cell that fights infection) and hyperlipaemia (high blood levels of a type of fat).
For the full list of all side effects reported with Torisel, see the package leaflet.
Torisel must not be used in people who are hypersensitive (allergic) to temsirolimus, to its metabolites (the substances that it is broken down into) including sirolimus (a medicine used to prevent rejection of transplanted kidneys), to polysorbate 80 or to any of the other ingredients of the medicine. Torisel is not recommended in patients with mantle cell lymphoma who have moderate or severe problems with their liver.
Why is Torisel approved?
The Agency’s Committee for Medicinal Products for Human Use (CHMP) decided that Torisel’s benefits are greater than its risks and recommended that it be given marketing authorisation.
What measures are being taken to ensure the safe and effective use of Torisel?
Recommendations and precautions to be followed by healthcare professionals and patients for the safe and effective use of Torisel have been included in the summary of product characteristics and the package leaflet.
Other information about Torisel
The European Commission granted a marketing authorisation valid throughout the European Union for Torisel on 19 November 2007.
For more information about treatment with Torisel, read the package leaflet (also part of the EPAR) or contact your doctor or pharmacist.
The summary of the opinion of the Committee for Orphan Medicinal Products for Torisel can be found on the Agency’s website.
Source: European Medicines Agency
Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.