Pralatrexate (Folotyn) is supplied as a clear, yellow liquid solution in single-dose glass vials for intravenous injection. It is available in liquid strengths of 20 mg/1 mL and 40 mg/2 mL (concentration of 20 mg/mL). It must not be diluted before administrationPralatrexate (Folotyn) is supplied as a clear, yellow liquid solution in single-dose glass vials for intravenous injection. It is available in liquid strengths of 20 mg/1 mL and 40 mg/2 mL (concentration of 20 mg/mL). It must not be diluted before administration.