From that page;
According to the product labeling of infliximab (Remicade), etanercept (Enbrel), and adalimumab (Humira), these drugs are in the class of immunosuppressants. A number of studies and reports of adverse and serious adverse reactions in patients receiving infliximab have been conducted. Risks include:
serious and sometimes fatal blood disorders
serious infections
lymphoma and solid tissue cancers
reports of serious liver injury
reactivation of hepatitis B
reactivation of tuberculosis[18]
lethal hepatosplenic T-cell lymphoma (generally only when combined with 6-mercaptopurine)
drug-induced lupus
demyelinating central nervous system disorders
Cases of leukopenia, neutropenia, thrombocytopenia, and pancytopenia (some fatal) have been reported with infliximab.[19] The FDA issued a warning to doctors appearing in the respective product labeling of infliximab instructing them to screen and monitor potential patients more carefully.[20] The FDA issued a warning to doctors that there is an increased risk of lymphoma and other cancers associated with the use of infliximab and other tumor necrosis factor blockers in children and adolescents.[21]
Maintenance therapy with the drug (versus intermittent or sporadic therapy) lessens the likelihood of developing antibodies to infliximab which are known to reduce the efficacy of the drug.Combination treatment with methotrexate (an antifolate drug which suppresses the immune system) has been shown to reduce the formation of these antibodies in patients with rheumatoid arthritis[22] and combination therapy with other immunosuppressants has been shown to reduce the likelihood of these antibodies being formed in Crohn's disease.[15] The use of immunosuppressants may not be necessary in all diseases for which infliximab is indicated, and indiscriminant uses of these other immunosuppressants carry their own risks. Infliximab was studied in monotherapy (without concomitant immunosuppressants such as methotrexate or azathioprine) in psoriasis, psoriatic arthritis, and ankylosing spondylitis. Only its use in rheumatoid arthritis requires the concomitant use of methotrexate by FDA product labeling; however, the concomitant use of methotrexate in other disease states may help to reduce the body's immune response to the infliximab and increase its duration of efficacy.
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Good natural Omega three side effects? Ummm pretty much none...