The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The process by which the amount of a drug in the body decreases after administration, but before entering the systemic circulation is called:   (A) Excretion   (B) First pass effect   (C) First order elimination   (D) Metabolism
['(B) First pass effect <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Excretion \n (B) First pass effect \n (C) First order elimination \n (D) Metabolism <> possible answers', '  The process by which the amount of a drug in the body decreases after administration, but before entering the systemic circulation is called: <> context@']