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Week 2
Term Definitions
| Term | Definition |
|---|---|
| Low Dose-Effective Curve | Measuring the response to the dose of the drug. |
| Potency | The amount of drug required to produce and effect. |
| Efficacy | Related to the maximal effect of a drug regardless of dose: is the maximum intensity of effect or response that can be produced by a drug. |
| Therapeutic action/effect | the intended or desired results |
| Therapeutic range | range between the dose causing the minimum effect and the dose causing the minimum adverse effect. |
| Therapeutic index (TI) | number that determines the safety of a drug (the greater the TI, the safer the drug) |
| Prophylactic | refers to measures or treatments designed to prevent disease or a condition before it occurs. |
| Receptors | is a protein in or on a cell that a drug or natural substance binds to in order to cause a specific effect in the body. |
| Agonist | is a drug that has an affinity for a receptor, combines with a receptor and produces an effect. |
| Antagonist | is a drug that binds to a receptor but does not activate it; instead, it blocks or reduces the effect of other substances. Counteracts the action of the agonist. |
| Renal | Kidney |
| Hepatic | Liver |
| Biotransformation | Is the body’s way of changing a drug so that it can be more easily excreted by the kidneys. |
| Tolerance | the need for an increasingly larger dose of the drug to obtain the same effect as the original dose |
| duration | is the length of a drugs effect. |
| Half-Life | the half life of a drug is the amount of time that passes for its concentration to fall to half its original blood level. |
| Median effect dose (ED50) | Is the dose required to produce a desired clinical effect in 50% of test subjects. A low effective dose is preferred because it means less drug is needed to achieve the desired therapeutic effect. |
| Lethal Dose (LD50) | The amount of a substance that causes death in 50% of a test population. A lower LS means the substance is more toxic. |
| Enteral | Drugs are placed directly into the GI tract by oral or rectal administration |
| Parental | Administered or occurring elsewhere in teh body other than the mouth and alimentary canal |
| Absorption | Is the process by which drug molecules are transferred from the site of administration to the circulating blood. |
| Metabolism | Is the body’s was of changing a drug so that it can be more easily excreted by the kidneys |
| Distribution | The passage of drugs into various body fluid compartments such as plasma, interstitial fluids and intracellular fluids. |
| Excretion | The elimination of a drug and its metabolites from the body. |
| First-pass effect | The first pass effect occurs when a drug is partially broken down by the liver before it reaches the bloodstream, reducing the amount of drug available to produce its effect. |