This article throws light upon the eight main physiological factors that affect the rate of drug absorption. The factors are: 1. Passage of Drug Molecule Across Membranes 2. pKa 3. pH - pka Partion Concept 4. pH-Partition Hypothesis 5. Active Transport 6. Facilitated Diffusion 7. Pinocytosis (Vesicular Transport) 8. Pore or Convective Transport. Physiologic Factor # 1. Passage of Drug [...]
After reading this article you will learn about: 1. Definition and Need of Metabolism 2. Types of Metabolism. Definition and Need of Metabolism: Metabolism is a process of alteration of drugs in the body so as to modify their activity and structure. If lipophylic drugs are not metabolized it will be reabsorbed by the kidney tubule and will circulate in [...]
After reading this article you will learn about the concept and types of pharmacokinetic models. Concept of Pharmacokinetic Models: Drugs remain in dynamic state within the body and drug events often happen simultaneously. In order to describe a complex biologic system, assumptions are made concerning the movement of drugs. The mathematical models are used to describe the absorption, distribution and [...]