| A | B |
|---|
| Pharmacokinetics | Study of how the body absorbs, uses, and gets rid of medications |
| Teratogenicity | The ability to cause birth defects |
| Loading dose | The initial dose given to get the drug concentration up to the therapeutic range in a very short period of time |
| Carcinogenicity | The ability to cause cancer |
| Pharmacodynamics | Study of a drug's mechanisms of action and its biological and physiological effects |
| Antagonist | A drug that inhibits or blocks the response of a cell |
| APHIS | Agency responsible for regulating vaccines (biologics) |
| DEA | Agency responsible for regulating controlled substances |
| EPA | AGency responsible for regulating non-systemic pesticides |
| FDA | Agnecy responsible for regulating medications |
| Bioavailability | Percent of drug administered that enters the systemic circulation |
| Agonist | A drug that stimulate the response of a cell |
| Prescription | A medication that can only be under the supervision of a physician or veterinarian |
| OTC | Drug for which no prescription is required |
| Extra-label drug | Drug used in a manner for which it was not FDA approved |
| Therapeutic index | Margin of safety - comparison of the lethal dose to the effective dose of a drug |
| Therapeutic Margin | Drug concentration in the body that produces the desired effect with minimal or no signs of toxicity |
| Dose | The amount of drug to be administered |
| Dosage | The amount of drug per body weight to be administered |
| Dosage Regiment | Amount, frequency, and duration that a drug is be administed |
| Withdrawl Time | Period of time after drug administration during which the animal or food products from it cannot be sent to market or slaughter |
| Half-life | Length of time it takes for half of the amount of drug in the body to be reduced by half |
| Steady state | Point at which drug accumulation and elimination are balanced (5 half-lives) |
| Affinity | Strength of binding between a drug and its receptor |
