A Phase II Study of Pemetrexed Plus Gemcitabine for Metastatic/Recurrent Head and Neck Cancer (HNSCC)

"Patients will receive pemetrexed (500 mg/m2 IV infusion over approximately 10 minutes) followed immediately by gemcitabine (1250 mg/m2 IV infusion given over approximately 30 minutes) on day 1 and day 15 of a 28-day cycle. Vitamin supplementation will be as follows: Vitamin B12: 1000 µg IM injection no less than 1 week prior to the first dose of pemetrexed, and continuing approximately every 9 weeks until 3 weeks after the last dose of pemetrexed.~Folic acid: The preferred oral daily dose of folic acid is 350 to 1000 µg. Daily folate supplementation begins no less than 1 week prior to the first dose of pemetrexed and continues until 3 weeks after the last dose of pemetrexed.~For rash prophylaxis, dexamethasone (4 mg po twice per day) should be taken on the day before, the day of, and the day after each dose of pemetrexed unless clinical contraindications exist."