About Allos TherapeuticsAllos Therapeutics, Inc. (Nasdaq: ALTH) is a biopharmaceutical company committed to the development and commercialization of innovative anti-cancer therapeutics. Allos is currently focused on the development and commercialization of FOLOTYN ® (pralatrexate injection), a folate analogue metabolic inhibitor. FOLOTYN is approved in the U.S. for the treatment of patients with relapsed or refractory PTCL. For additional information, please visit www.allos.com. IMPORTANT SAFETY INFORMATION Warnings and PrecautionsFOLOTYN may suppress bone marrow function, manifested by thrombocytopenia, neutropenia, and anemia. Monitor blood counts and omit or modify dose for hematologic toxicities. Mucositis may occur. If ≥Grade 2 mucositis is observed, omit or modify dose. Patients should be instructed to take folic acid and receive vitamin B 12 to potentially reduce treatment-related hematological toxicity and mucositis. Fatal dermatologic reactions may occur. Dermatologic reactions may be progressive and increase in severity with further treatment. Patients with dermatologic reactions should be monitored closely, and if severe, FOLOTYN should be withheld or discontinued. Tumor lysis syndrome may occur. Monitor patients and treat if needed. FOLOTYN can cause fetal harm. Women should avoid becoming pregnant while being treated with FOLOTYN and pregnant women should be informed of the potential harm to the fetus. Use caution and monitor patients when administering FOLOTYN to patients with moderate to severe renal function impairment. Elevated liver function test abnormalities may occur and require monitoring. If liver function test abnormalities are ≥Grade 3, omit or modify dose. Adverse ReactionsThe most common adverse reactions were mucositis (70%), thrombocytopenia (41%), nausea (40%), and fatigue (36%). The most common serious adverse events are pyrexia, mucositis, sepsis, febrile neutropenia, dehydration, dyspnea, and thrombocytopenia. Use in Specific Patient PopulationNursing mothers should be advised to discontinue nursing or the drug, taking into consideration the importance of the drug to the mother. Drug InteractionsCo-administration of drugs subject to renal clearance (e.g., probenecid, NSAIDs, and trimethoprim/sulfamethoxazole) may result in delayed renal clearance. Please see FOLOTYN Full Prescribing Information at www.FOLOTYN.com. Safe Harbor Statement This press release contains forward-looking statements that are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include statements regarding the Company’s intent to submit a request for re-examination of the CHMP opinion; the potential to obtain conditional approval of FOLOTYN from the EMA for the treatment of patients with PTCL whose disease has progressed after at least one prior systemic therapy; and other statements that are other than statements of historical facts. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “projects,” “potential,” “continue,” and other similar terminology or the negative of these terms, but their absence does not mean that a particular statement is not forward-looking. Such forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties that may cause actual results to differ materially from those anticipated by the forward-looking statements. Important factors that may cause actual results to differ materially include, but are not limited to, that the design of and data collected from the Company’s pivotal PROPEL trial may not be adequate to demonstrate the safety and efficacy of FOLOTYN for the treatment of patients with PTCL whose disease has progressed after at least one prior systemic therapy, or otherwise be sufficient to support EMA approval; and risks and uncertainties relating to the Company’s strategic collaboration with Mundipharma, including the parties’ future product development, regulatory and commercialization strategies. Additional information concerning these and other factors that may cause actual results to differ materially from those anticipated in the forward-looking statements is contained in the "Risk Factors" section of the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, and in the Company's other periodic reports and filings with the Securities and Exchange Commission. The Company cautions investors not to place undue reliance on the forward-looking statements contained in this press release. All forward-looking statements are based on information currently available to the Company on the date hereof, and the Company undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date of this presentation, except as required by law.