pemetrexed monohydrate - Medications

Pemetrexed is a folate analog metabolic inhibitor. The drug substance, pemetrexed diacid monohydrate, has the chemical name N-[4-[2-(2-amino-4,7-dihydro-4-oxo-1 H -pyrrolo[2,3- d ] pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic acid, monohydrate with a molecular formula of C 20 H 21 N 5 O 6 • H 2 O and a molecular weight of 445.43. It is practically insoluble in water. The structural formula is as follows: Pemetrexed Injection is supplied as a sterile solution for intravenous infusion available in single-dose vials. The product is a clear to slightly yellowish or slightly yellow-greenish solution. Each mL contains 25 mg pemetrexed, 35 mg tromethamine, 10 mg citric acid anhydrous, 0.5 mg methionine and water for injection. Tromethamine may have been added to adjust pH. 1

Pemetrexed is a folate analog metabolic inhibitor. Pemetrexed diacid, the drug substance, has the chemical name N-[4-[2-(2-amino-4,7-dihydro-4-oxo-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glumatic acid. The molecular formula is C 20 H 21 N 5 O 6 and the molecular weight is 427.41. The structural formula is as follows: PEMFEXY (pemetrexed injection) for intravenous use is a sterile, clear, colorless to yellow or green-yellow solution . Each mL contains: 25 mg pemetrexed diacid, 260 mg propylene glycol, up to 16.5-19.9 mg tromethamine, and water for injection. Additional tromethamine not exceeding 19.9 mg/mL and/or hydrochloric acid may be added for pH adjustment. Chemical Structure