Can suppress bone marrow function as manifested by neutropenia, thrombocytopenia & anemia (or pancytopenia). Monitor patients for myelosuppression during therapy & do not give to patients until ANC returns to ≥1,500 cells/mm
3 & platelet count returns to ≥100,000 cells/mm
3. Instruct patients to take folic acid & vit B
12 as prophylactic measure to reduce treatment-related toxicity. Reports of skin reactions in patients not pre-treated w/ corticosteroid; serious renal events, including acute renal failure; nephrogenic diabetes insipidus & renal tubular necrosis; severe dehydration; serious CV events, including MI & cerebrovascular events (uncommon); cases of radiation pneumonitis in patients treated w/ radiation either prior, during or subsequent to pemetrexed therapy; cases of radiation recall in patients who received RT wk or yr previously. Patients should receive adequate antiemetic treatment & appropriate hydration prior to &/or after receiving treatment. Not recommended w/ live attenuated vaccines. Caution against driving or operating machinery if fatigue occurs. Patients w/ hepatic impairment eg, bilirubin >1.5 times ULN &/or transaminase >3 times ULN (hepatic metastases absent) or >5 times ULN (hepatic metastases present) have not been specifically studied. Patients w/ mild to moderate renal insufficiency (CrCl 45-79 mL/min) should avoid taking NSAIDs eg, ibuprofen, & ASA (>1.3 g daily) for 2 days before, on the day of, & 2 days following pemetrexed administration; NSAIDs w/ long elimination t
1/2 should be interrupted for at least 5 days prior to, on the day of, & at least 2 days following pemetrexed administration. Not recommended in patients w/ CrCl <45 mL/min. Can have genetically damaging effects; sexually mature males are advised not to father a child during treatment & up to 3 mth thereafter. Possible to cause irreversible infertility in males. Women of childbearing potential must use effective contraception during treatment & for 6 mth following completion of treatment. Should not be used during pregnancy unless clearly necessary. Not recommended for use in childn.