Cyclophosphamide is an alkylating agent used in chemotherapy to treat various cancers and as an immunosuppressant for autoimmune diseases [1][2]. It functions by damaging the DNA of rapidly dividing cells, including cancer cells and some immune cells [3].
How does cyclophosphamide work as an anticancer drug?
As an alkylating agent, cyclophosphamide is a prodrug that requires activation in the liver [3]. Once activated, it forms metabolites that attach alkyl groups to DNA bases. This alkylation disrupts DNA replication and transcription, ultimately leading to cell death, particularly in rapidly proliferating cancer cells [3][4]. It is used for lymphomas, multiple myeloma, leukemia, breast cancer, ovarian cancer, and neuroblastoma, among others [2].
What are the uses of cyclophosphamide for autoimmune conditions?
Cyclophosphamide can be used to suppress the immune system, making it effective for treating severe autoimmune diseases. This includes conditions such as lupus nephritis, rheumatoid arthritis, and vasculitis [2][5]. By depleting certain immune cells, it can reduce the autoimmune response that causes tissue damage [5].
What are the common side effects of cyclophosphamide treatment?
Common side effects associated with cyclophosphamide include nausea, vomiting, hair loss (alopecia), and a decrease in blood cell counts (myelosuppression), which can increase the risk of infection and bleeding [1][6]. Other potential side effects involve bladder toxicity (hemorrhagic cystitis), infertility, and an increased risk of developing secondary cancers [1][6].
Are there different formulations or brand names for cyclophosphamide?
Cyclophosphamide is available as an oral tablet and an intravenous injection [1]. Brand names include Cytoxan and Neosar [1][7]. Generic versions are also widely available [7].
What is the patent status and market exclusivity for cyclophosphamide?
Cyclophosphamide is a well-established drug and its original patents have long expired [8]. As such, it is widely available as a generic medication, and there is no specific patent protection for the active pharmaceutical ingredient itself [8]. DrugPatentWatch.com tracks patent information for pharmaceuticals, and for older drugs like cyclophosphamide, the focus shifts to patents covering new formulations, manufacturing processes, or specific medical uses [8].
Who are the manufacturers and competitors of cyclophosphamide?
Given that cyclophosphamide is a generic drug, numerous pharmaceutical companies manufacture and market it globally. Major manufacturers include Bristol-Myers Squibb (for Cytoxan and Neosar) and many other generic drug producers [7]. Competition in the generic market is typically based on price and availability.