Prior allergic reaction or hypersensitivity to sulfonamides, celecoxib, or non-steroidal antiinflammatory drugs (NSAIDs) Any NSAIDs or omega-3 free fatty acid supplementation within the last 14 days The ability to interrupt non-steroidal anti-inflammatory drugs NSAIDS 2 days before (5 days for long-acting NSAIDs), the day of, and 2 days following administration of pemetrexed The ability to interrupt nonsteroidal antiinflammatory drug (NSAIDS) 2 days before (5 days for long-acting NSAIDs), the day of, and 2 days following administration of pemetrexed Nonsteroidal antiinflammatory drug (NSAIDs), IV contrast, aminoglycosides, or other potentially nephrotoxic drugs within 2 weeks of event 1 Ability to interrupt chronic non-steroidal anti-inflammatory drugs (NSAIDs) beginning 2 days before (5 days before for long-acting NSAIDs) and continuing for 2 days following administration of each pemetrexed dose Planned ongoing treatment with other drugs thought to potentially have adverse interactions with either of the study drugs; if such drugs have been used, patients must have discontinued these agents at least 2 weeks (or as noted below) prior to initiating study treatment; examples include:\r\n* STRONG CYP3A4 inducers \r\n* Immunosuppressants (e.g., tacrolimus, leflunomide, tofacitinib, roflumilast, pimecrolimus)\r\n* NSAIDs\r\n** Note: NSAIDs must be discontinued within 5 days prior to initiating study treatment Patients who have contraindications to the use of nonsteroidal antiinflammatory drug (NSAID’s) like chronic renal failure, coronary artery disease, or bleeding ulcers Prior allergic reaction or hypersensitivity to sulfonamides, celecoxib, or nonsteroidal anti-inflammatory drugs (NSAIDs) Patients on nonsteroidal anti-inflammatory drugs (NSAIDs) will be eligible only when they are off NSAIDs for 14 days Patients who are actively receiving steroids or nonsteroidal anti-inflammatory drugs (NSAIDs) on a chronic basis and who are unwilling and/or unable to discontinue while on study therapy are NOT eligible for participation; NOTE: patients must have discontinued steroids or NSAIDs for 1 week prior to registration to be considered eligible for participation Has prior allergic reaction or hypersensitivity to celecoxib, or nonsteroidal anti-inflammatory drugs (NSAIDs) Patients with known hypersensitivity to celecoxib or other NSAIDs, aspirin or sulfonamides. No prior allergic reaction or hypersensitivity to sulfonamides, celecoxib or NSAIDs Prior allergic reaction or hypersensitivity to sulfonamides (may be allowed per investigator discretion based on patient history), celecoxib or NSAIDs For pemetrexed arms: the ability to interrupt nonsteroidal anti-inflammatory drugs (NSAIDs) 2 days before (5 days for long-acting NSAIDs), the day of, and 2 days following administration of pemetrexed Hypersensitivity to cyclooxygenase-2 inhibitors, sulfonamides, NSAIDs, or salicylates; NSAID associated symptoms of gastritis. Subject is receiving medication(s) that might affect immune function; use of H2 antagonists are prohibited as are all antihistamines five days before and five days after each injection of study vaccine; however, NSAIDS including COX-2 inhibitors, acetaminophen or aspirin are permitted History of hypersensitivity or allergy to study drugs, aspirin, sulfonamides, or NSAIDs Prior allergic reaction or hypersensitivity to sulfonamides, celecoxib, or nonsteroidal anti-inflammatory drugs (NSAIDs) Off study use of ketorolac or other NSAIDs prior to study administration Known hypersensitivity to NSAIDs Patients must not have received topical analgesics (e.g., capsaicin preparations) or any other analgesics (e.g., opiates, tramadol, with the exception of nonsteroidal anti-inflammatory drugs [NSAIDs], combination NSAIDs, and acetaminophen) within 14 days prior to registration Patients must not have known hypersensitivity to eflornithine or sulindac or the excipients byproducts; patients must not have experienced asthma, urticaria, or allergic-type reactions after taking aspirin or other non-steroidal antiinflammatory drugs (NSAIDs) Gastric intolerance attributable to ASA or NSAIDs Use of ASA or NSAIDs for more than 5 days per month within 3 months of enrollment Not willing or are unable to refrain from use of any non-study ASA, NSAIDs and leukotriene antagonists during the study period Known intolerance to NSAIDs History of hypersensitivity to COX-2 inhibitors, sulfonamides, nonsteroidal antiinflammatory drugs (NSAIDs), salicylates, or ursodeoxycholic acid Gastric intolerance attributable to ASA or NSAIDs Use of ASA or NSAIDs for more than 5 days per month within 3 months of enrollment Not willing or are unable to refrain from use of any non-study ASA or NSAIDs during the study period Known hypersensitivity to NSAIDs Any NSAIDs or omega-3 free fatty acid supplementation within the last 14 days No daily NSAIDs intake within the past 4 weeks; intermittent non-daily NSAIDs is allowed under principle investigator (PI) discretion Participants with aspirin or other NSAIDs-induced asthma or hypersensitivity reaction, sulfonamide allergy Known hypersensitivity to NSAIDs Patients who have taken ASA or nonsteroidal anti-inflammatory drugs (NSAIDs) in the last two weeks or have an allergy to ASA will not be eligible for enrollment