Anti TNF is a class of drugs that block the action of tumor necrosis factor (TNF), which instigates inflammation of the joints. Arava is a prescription drug and before you consider getting generic Arava medication you should consult your local doctor, who will weigh the benefits against the risks involved. Arava should not be taken by pregnant women as it causes birth defects. Women patients taking Arava should be particular about contraception throughout the course of treatment. Arava can cause mild liver irritation and your local doctor should know of any prior history of alcohol abuse, jaundice and hepatitis.