| A | B |
| Days Supply | The number of days that a prescription should last if a patient takes the medication according to directions. |
| DDS, DMD | Dentist. |
| DEA Form 41 | Form used by pharmacies to destroy controlled substances. |
| DEA Form 106 | Form used by pharmacies in the event of theft of controlled substances. |
| DEA Form 222 | Form used by pharmacies to order Schedule II controlled substances. These forms are also used to transfer Schedule II controlled substances to other pharmacies or reverse distributors. |
| DEA Number | A number assigned to a prescriber which documents his or her authority to prescribe controlled substances. Each pharmacy is also assigned a DEA number which documents its authority to stock and dispense controlled substances. |
| Deductible | A form of patient cost sharing. The amount that must be incurred and paid by the patient during a specified period of time before benefits are paid by the insurance company. |
| Diastolic Blood Pressure | Lower number on a blood pressure reading. |
| Diluent | Substance added to dilute another substance. |
| Disclosure | All pertinent information necessary for an informed decision is made available to a patient. |
| Dispense as Written (DAW) | A request by a prescriber that a pharmacist dispense the brand-name medication prescribed rather than a generic equivalent. Some third parties will reimburse pharmacies for multiple-source brand-name medications when prescribers insist on brand names. |
| Dispensing Fee | The portion of the third-party prescription reimbursement that is paid in addition to reimbursement for drug costs. This fee is supposed to cover the pharmacy’s overhead and profit. Usually this is a fixed fee, meaning it is the same for every prescription dispensed. |
| DO | Osteopath. |
| Dose | The amount of a medication taken at one time. |
| DPM | Podiatrist. |
| Dropper Bottle | A bottle designed to deliver a very small volume of medication at a time. These bottles may have droppers attached to the inside of their caps or may have small openings that allow administration of one drop of medication at a time. |
| Drug Enforcement Administration (DEA) | Federal agency that regulates manufacturing, distribution, prescribing, and dispensing of controlled substances. |
| Drug-Disease Alert Procedure | A procedure that is followed when the pharmacy computer system identifies a potential drug therapy problem such as a contraindication, drug interaction, or non-compliance. |
| Drug Interaction | A situation in which the effect of one medication is changed by another medication that a patient is taking at the same time. These 'drug interactions' are usually classified in computer systems by their severity. |
| Drug Utilization Review | A process in which patterns of prescribing, dispensing and usage of prescription drugs are monitored. DUR may be prospective or retrospective. |
| Durable Medical Equipment | 'Durable' or long-lasting medical devices or patient aids such as wheelchairs, walkers, or hospital beds. |
| Duration | The length of time a medication is taken. |
| DVM | Veterinarian. |
| Effervescent Tablet | A medication dosage form containing mixtures of acids and sodium bicarbonate, plus active ingredients, which are dissolved in a glass of water which the patient drinks. |
| Electronic Claims Adjudication | The process of using a computer and modem to determine whether a third-party claim will be paid, and if so, the amount of payment the pharmacy can expect to receive. |
| Elixir | Clear hydroalcoholic liquid intended for oral use, often containing flavoring agents. |
| Emulsion | Oil and water mixture which, in time, usually separates into an oil layer on top and a water layer on the bottom. Emulsions must be shaken before use. |
| Enteric-Coated Tablet | Tablet with a coating designed to allow it to pass through the stomach intact so that it dissolves in the intestine instead. |
| Enzyme | Medication that aids in digestion or reduces nausea. Facing the Stock Bottles - Pulling merchandise forward to the edge of the shelf when restocking inventory. |
| Etiology | The cause of an illness |
| Exacerbation | Sudden worsening of a condition; flare-up. |
| Expectorant | Medication class used to reduce mucus production. |