Ledoxina tablets

Ledoxina

  • Active Ingredient: Cyclophosphamide
  • 50 mg
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What is Ledoxina?

The active ingredient of Ledoxina brand is cyclophosphamide. The originating document has been archived. We cannot confirm the completeness, accuracy and currency of the content. Each tablet for oral administration contains Cyclophosphamide (anhydrous) 25 mg or 50 mg. In addition, each tablet contains the following inactive ingredients: acacia, FD&C Blue No. 1, lactose monohydrate, magnesium stearate, and microcrystalline cellulose.

Used for

Ledoxina is used to treat diseases such as: Acute Lymphocytic Leukemia, Acute Nonlymphocytic Leukemia, Bladder Cancer, Brain Tumor, Breast Cancer, Bullous Pemphigoid, Cancer, Cervical Cancer, Chronic Lymphocytic Leukemia, Chronic Myelogenous Leukemia, Cogan's Syndrome, Dermatomyositis, Diffuse Large B-Cell Lymphoma, Endometrial Cancer, Ewing's Sarcoma, Histiocytosis, Hodgkin's Lymphoma, IgA Nephropathy, Mantle Cell Lymphoma, Multiple Myeloma, Multiple Sclerosis, Mycosis Fungoides, Nephrotic Syndrome, Neuroblastoma, Non-Hodgkin's Lymphoma, Non-Small Cell Lung Cancer, Organ Transplant, Rejection Prophylaxis, Osteosarcoma, Ovarian Cancer, Pemphigoid, Pemphigus, Prostate Cancer, Rheumatoid Arthritis, Scleroderma, Small Cell Lung Cancer, Systemic Lupus Erythematosus, Systemic Sclerosis, Testicular Cancer, Wegener's Granulomatosis, Wilms' Tumor.

Side Effect

Possible side effects of Ledoxina include: fever or chills; Black, tarry stools; shortness of breath; swelling of the feet or lower legs; fast heartbeat; nausea or vomiting; flushing or redness of the face.

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How should this medicine be used?

Ledoxina injection comes as a powder to be added to fluid and injected intravenously (into a vein) by a doctor or nurse in a medical office or hospital outpatient clinic. It may also be injected intramuscularly (into a muscle), intraperitoneally (into the abdominal cavity), or intrapleurally (into the chest cavity). The length of treatment depends on the types of drugs you are taking, how well your body responds to them, and the type of cancer or condition you have.

Your doctor may need to delay your treatment or adjust your dose if you experience certain side effects. It is important for you to tell your doctor how you are feeling during your treatment with Ledoxina injection.

Fig. 4.1

Metabolic pathway of Ledoxina

A minor pathway results in dechloroethylation and the formation of 2-dechloroethylLedoxina and another alkylating agent, chloroacetaldehyde (Balu et al., 2002).

The other compounds such as 4-ketoLedoxina and propionic acid derivative are relatively non-toxic, and are the major urinary metabolites of Ledoxina in several species (IARC, 1981).

Nausea and vomiting occur with Ledoxina therapy. Anorexia and, less frequently, abdominal discomfort or pain and diarrhea may occur. There are isolated reports of hemorrhagic colitis, oral mucosal ulceration and jaundice occurring during therapy.

Other uses for this medicine

Ledoxina is also sometimes used to treat a certain type of lung cancer (small cell lung cancer; SCLC). It is also used to treat rhabdomyosarcoma (a type of cancer of the muscles) and Ewing's sarcoma (a type of bone cancer) in children. Talk to your doctor about the risks of using this medication for your condition.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What is Cyclophospham >

Ledoxina is the generic name of the prescription drug Cytoxan, a chemotherapy drug for people with certain cancers.

Ledoxina is sometimes used to treat kidney damage.

Doctors may also prescribe Ledoxina off-label to treat some kidney infections; systemic sclerosis or scleroderma (hardening of the organs and body tissues); and juvenile arthritis.

The Food and Drug Administration (FDA) approved Ledoxina as Cytoxan in 1959, and Baxter International, Inc. manufactures it.

4.2.1 Overview of the metabolism

Ledoxina (CP) and its structural isomer ifosfamide (IF) are among the most widely therapeutically used alkylating anti-cancer agents. Both compounds are prodrugs that are bioactivated by CYP-450 enzymes to exert their toxic activity. 126–128

The initial CYP-450-catalysed metabolic step leads to the formation of 4-hydroxymetabolites, 4-hydroxyLedoxina (OHCP) or 4-hydroxyifosfamide (OHIF), that equilibrate with their ring-opened aldo tautomers, aldoLedoxina (AldoCP) or aldoifosfamide (AldoIF) ( Figures 14 and 15 ). These aldo intermediates are believed to play a pivotal role in anti-tumour efficacy of these drugs by partitioning between pathways giving either the cytotoxic agent or a biologically inactive compound. Indeed, the aldo derivatives undergo a non-enzymic β-elimination of urotoxic and nephrotoxic acrolein to yield the ultimate alkylating species, phosphoramide mustard (PM) or isophosphoramide mustard (IPM). Alternatively, it may be oxidised to inactive carboxyLedoxina (CXCP) or carboxyifosfamide (CXIF) by aldehyde dehydrogenase (ALDH) or reduced to alcoLedoxina (AlcoCP) or alcoifosfamide (AlcoIF) by an aldehyde reductase. OHCP and OHIF may also be partially deactivated to 4-ketoLedoxina (KetoCP) or 4-ketoifosfamide (KetoIF). 128

4.4. Synthesis

Ledoxina, after its bioactivation to alkylating metabolites, is carcinogenic via a genotoxic mechanism.

Ledoxina is used in combination therapy for the treatment of non-Hodgkin lymphoma, including high-grade lymphomas, such as Burkitt lymphoma and lymphoblastic lymphoma, as well as intermediate- and low-grade lymphomas. Ledoxina is commonly used with doxorubicin (hydroxydaunorubicin), vincristine (oncovin), and prednisone (known as the CHOP regimen), with or without other agents, in the treatment of various types of intermediate-grade non-Hodgkin lymphoma. Ledoxina has also been used as a single agent in the treatment of low-grade lymphomas.

2. Cancer in Humans

The carcinogenicity of Ledoxina in humans was established initially on the basis of a large number of case reports, as well as several epidemiological studies (IARC 1981, 1987a). The interpretation of the epidemiological studies was limited by the small numbers of cases, the difficulty in separating the role of Ledoxina from other agents, or both factors.

The most substantial evidence available to previous Working Groups was a Danish study of 602 patients treated “mainly with Ledoxina” for non-Hodgkin lymphoma, in which nine cases of acute myeloid leukaemia were observed compared to 0.12 expected (Pedersen-Bjergaard et al., 1985), and a case–control study of leukaemia following ovarian cancer in the former German Democratic Republic where a strong dose–response relationship was observed (Haas et al., 1987). All other studies reported at most three cases of leukaemia or bladder cancer in people who had received Ledoxina as the only potentially carcinogenic agent (IARC, 1981; Kinlen, 1985; Greene et al., 1986).

Subsequently, further studies have been published that have provided more detailed information on the carcinogenicity of Ledoxina. This review is restricted to epidemiological studies that have used appropriate comparison groups to investigate the role of Ledoxina as the cause of specific types of cancer.

There have been several reported cohort studies in which patients treated with Ledoxina were followed up, and the occurrence of second cancers investigated. Valagussa et al. (1994) followed 2465 women who had received treatment with Ledoxina, methotrexate and fluorouracil, a combination in which only Ledoxina is considered to have carcinogenic potential in humans. There were three cases of acute myeloid leukaemia observed compared to 1.3 expected, and five cases of bladder cancer compared to 2.1 expected. Statistical significance was not reported but was calculated by the Working Group to be greater than 0.05 for both types of cancer. Smith et al. (2003) followed 8563 women who had received Ledoxina and doxorubicin as adjuvant therapy for breast cancer and observed 43 cases of acute myeloid leukaemia or myelodysplastic syndromes (AML/MDS). The incidence of AML/MDS overall was seven times higher than expected rates in the general population, and was increased 3-fold in regimens that contained double the cumulative dose of Ledoxina.

Several case–control studies have also been reported. For leukaemia, Kaldor et al. (1990) investigated 114 cases of a cohort of ovarian cancer patients. The relative risks were, respectively, 2.2 and 4.1 in two increasing dose categories of Ledoxina. Neither increase was reported as statistically significant. Travis et al. (1994) carried out a study involving 35 cases of leukaemia following non-hodgkin lymphoma, and found that prior treatment with Ledoxina was associated with a relative risk of 1.8 that was not statistically significant when comparison was made to treatment with radiotherapy alone. In an investigation by Nandakumar et al. (1991) of 97 cases of myeloid leukaemia as second primary cancers, patients receiving Ledoxina had a relative risk of 12.6 compared to those treated surgically, and was substantially higher when prednisone was co-administered with Ledoxina. Curtis et al. (1992) compared 90 women who developed acute myeloid leukaemia following breast cancer to controls, and found that the risk of leukaemia was 2.6 times greater in those who had received Ledoxina, compared to women who had been treated by surgery only.

There have also been two case–control studies of bladder cancer in relation to cyclophospham >

Alcohol

Drinking alcohol doesn’t cause any problems for the majority of people who take Ledoxina. However, some people find that the combination of alcohol and Ledoxina can cause them to feel or be sick.

Try to stick within the government guidelines, which say that men and women should have no more than 14 units of alcohol a week. This is equivalent to about six glasses of wine or six pints of beer.

You can find out more about units of alcohol at www.drinkaware.co.uk.

Ledoxina is used in combination chemotherapy regimens (e.g. Ledoxina, adriamycin, and vincristine ; Ledoxina, adriamycin, and etoposide ) for the treatment of extensive-stage small cell lung cancer.

Ledoxina Overdose

Because Ledoxina can only be administered in a hospital or clinical setting, you shouldn’t have to worry about overdosing.

However, if you think you have been given too much Ledoxina, contact an emergency room at 911 or a poison control center at (800) 222-1222 right away.


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