1 A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. 2  In a chemical reaction, the atoms and molecules that interact with each other are called reactants. 3  In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, the atoms and molecules produced by the reaction are called products. 2  In a chemical reaction, only the atoms present in the reactants can end up in the products. 3  No new atoms are created, and no atoms are destroyed.
Humira (adalimumab) is a biologic drug that works by blocking a protein known as TNF-alpha. Normally, TNF-alpha helps fight infection, but in excess amounts, it can cause painful inflammation and severe joint damage -- common symptoms of rheumatoid arthritis and other forms of inflammatory arthritis.
You should discuss the potential benefits and risks of HUMIRA with your doctor. HUMIRA is a tumor necrosis factor (TNF) blocker medicine that can lower the ability of your immune system to fight infections. You should not start taking HUMIRA if you have any kind of infection unless your doctor says it is okay.