Pemetrexed is a chemotherapy medication used primarily to treat non-squamous non-small cell lung cancer (NSCLC) and mesothelioma. It works by inhibiting key enzymes required for the synthesis of DNA and RNA, thereby slowing the growth and spread of cancer cells. Pemetrexed is often used in combination with other agents, such as pembrolizumab and platinum-based drugs, for advanced or metastatic cancers.
Parent: Pemetrexed
Parent: Pemetrexed
Parent: Pemetrexed
Parent: Pemetrexed / Pemetrexed Disodium Heptahydrate
Parent: Pemetrexed
Parent: Pemetrexed
Parent: Pemetrexed
![Sodium 2-(4-(2-(2-amino-1-nitroso-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)pentanedioate](https://veeprho.com/wp-content/uploads/2023/12/VE0017003-Sodium-2-4-2-2-amino-1-nitroso-4-oxo-4-7-dihydro-1H-pyrrolo-2-3-d-pyrimidin-5-yl-ethyl-benzamido-pentanedioate.png "Sodium 2-(4-(2-(2-amino-1-nitroso-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)pentanedioate")
Parent: Pemetrexed
![Sodium 2-(4-(2-(2-amino-1,7-dinitroso-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)pentanedioate](https://veeprho.com/wp-content/uploads/2023/12/VE0017001-Sodium-2-4-2-2-amino-1-7-dinitroso-4-oxo-4-7-dihydro-1H-pyrrolo-2-3-d-pyrimidin-5-yl-ethyl-benzamido-pentanedioate.png "Sodium 2-(4-(2-(2-amino-1,7-dinitroso-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)pentanedioate")
Parent: Pemetrexed
![Sodium 2-(4-(2-(2-amino-7-nitroso-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)pentanedioate](https://veeprho.com/wp-content/uploads/2023/12/VE0017000-Sodium-2-4-2-2-amino-7-nitroso-4-oxo-4-7-dihydro-3H-pyrrolo-2-3-d-pyrimidin-5-yl-ethyl-benzamido-pentanedioate.png "Sodium 2-(4-(2-(2-amino-7-nitroso-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)pentanedioate")
Parent: Pemetrexed
![(S)-2-(4-(2-(2-amino-7-nitroso-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)pentanedioic acid](https://veeprho.com/wp-content/uploads/2024/04/VE0019822-S-2-4-2-2-amino-7-nitroso-4-oxo-4-7-dihydro-3H-pyrrolo-2-3-d-pyrimidin-5-yl-ethyl-benzamido-pentanedioic-acid.png "(S)-2-(4-(2-(2-amino-7-nitroso-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)pentanedioic acid")
Parent: Pemetrexed
Impurities in pemetrexed may arise during manufacturing, handling, or storage. Controlling these impurities is essential to ensure the medication’s safety, efficacy, and stability.
Related Substances
These are byproducts or intermediates formed during the synthesis of pemetrexed. Strict regulatory limits are in place to ensure they remain within acceptable levels.
Degradation Products
Pemetrexed is sensitive to light and moisture, which can lead to degradation over time. Proper storage in a cool, dry place is critical to maintain its stability.
Residual Solvents
Trace amounts of solvents used during the manufacturing process may remain in the final product. Regulatory guidelines ensure these are within safe limits for human use.
Analytical Techniques for Monitoring Impurities
Techniques such as High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (LC-MS) are used to detect and quantify impurities in pemetrexed formulations.
Pemetrexed is an antifolate chemotherapy drug. It works by inhibiting enzymes involved in folate metabolism, which is necessary for the synthesis of DNA and RNA in cancer cells.
Pemetrexed inhibits multiple enzymes, including thymidylate synthase, dihydrofolate reductase, and glycinamide ribonucleotide formyltransferase, which are essential for purine and pyrimidine synthesis. This inhibition disrupts DNA and RNA production, preventing cancer cell division.
Hair loss is not a common side effect of pemetrexed. However, some patients may experience thinning of hair. Side effects vary from person to person and should be discussed with your healthcare provider.
Vitamin B12 and folic acid are given with pemetrexed to reduce the risk of severe side effects, such as anemia, diarrhea, and low white blood cell counts. These supplements help protect healthy cells while pemetrexed targets cancer cells.
