Medical Definition of metastatic. 1  1: of, relating to, or caused by metastasis cutaneous metastatic disease as the first sign of lung cancer metastatic carcinoma metastatic spread. 2  2: tending to metastasize metastatic cancer cells metastatic prostate cancer.
Acetylcholinesterase inhibitor (generally referred to as cholinesterase inhibitor): a chemical that binds to the enzyme, cholinesterase, and prevents it from breaking down the neurotransmitter, acetylcholine.
One of the most widely used drugs to treat the symptoms of Alzheimer's disease. Aricept is FDA-approved for mild, moderate, and severe stages of the disease. How It Works: Aricept is a cholinesterase inhibitor that prevents the breakdown of acetylcholine in the brain.