Pharmacodynamics

The study of Pharmacodynamics focuses on how medications affect the body. The drug's interaction with tissue receptors found within cell membranes or intracellular fluid is the most frequent method. The amount of the activating medication (the "agonist") affects the degree of receptor activation and the ensuing biological reaction. The dose-response curve, which charts the medication dose (or concentration) against its effect, provides an explanation for this relationship. Patient characteristics (such as age and illness) and the availability of additional medications that compete with it for binding at the same receptor (such as receptor "antagonists") might have an impact on this crucial pharmacodynamic interaction. Some medications that operate on the same receptor (or tissue) differ in their ability to produce large biological reactions (i.e., their "efficacy") and the dosage needed to produce such responses (i.e., their "potency"). Drug receptors can be categorised according to how selectively they react to various medicines. Drugs can occasionally cause a diminished reaction when receptors or bodily systems are exposed to them repeatedly