| drug toxicity | The systemic effects of a drug that are related to the overall level of the medication in the bloodstream. Drug toxicity may occur with overdosage of a medication, accumulation of the drug in the body over time or the inability of the patients body to eliminate the drug. (27 Sep 1997) |
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| drug utilization | The utilization of drugs as reported in individual hospital studies, FDA studies, marketing, or consumption, etc. This includes drug stockpiling, and patient drug profiles. (12 Dec 1998) |
| drug utilization review | Formal programs for assessing drug prescription against some standard. Drug utilization review may consider clinical appropriateness, cost effectiveness, and, in some cases, outcomes. Review is usually retrospective, but some analysis may be done before drugs are dispensed (as in computer systems which advise physicians when prescriptions are entered). Drug utilization review is mandated for medicaid programs beginning in 1993. (12 Dec 1998) |
| drug withdrawal | A clinical syndrome of psychological, and, sometimes physical factors that result from the sustained use of a particular drug when the drug is abruptly withdrawn. Symptoms are variable but may include anxiety, nervousness, irritability, sweating, nausea, vomiting, rapid heart rate, rapid breathing and seizures. (27 Sep 1997) |
| dyskinesia, drug-induced | Abnormal movements induced as an adverse reaction of drug therapy. One particular movement disorder is the "on-off" effect. Tardive dyskinesia differs from akathisia, drug-induced in the repetitive nature of the movements rather than being associated with anxiety, restlessness, and agitation found in akathisia. (12 Dec 1998) |
| instillation, drug | The administration of therapeutic agents drop by drop, as eye drops, ear drops, or nose drops. It is also administered into a body space or cavity through a catheter. It differs from irrigation in that the irrigate is removed within minutes, but the instillate is left in place. (12 Dec 1998) |
| investigational new drug | Status given an experimental drug after the FDA approves an application for testing it in people. (09 Oct 1997) |
| investigational new drug application | An application that must be submitted to a regulatory agency (the FDA in the united states) before a drug can be studied in humans. This application includes results of previous experiments; how, where, and by whom the new studies will be conducted; the chemical structure of the compound; how it is thought to work in the body; any toxic effects found in animal studies; and how the compound is manufactured. (12 Dec 1998) |
| orphan drug | A pharmaceutical that has been abandoned or neglected during its development because it is seen as having only a limited potential for profit. Often a drug which only has a limited target population or which treats a rare disease, thus limiting its financial potential. (09 Oct 1997) |
| orphan drug act | Law giving incentives to companies developing a drug for a rare disease. The act gives the developer of the first drug of any one type a 7-year exclusive right to market the new drug. (14 Nov 1997) |
| orphan drug production | Production of drugs or biologicals which are unlikely to be manufactured by private industry unless special incentives are provided by others. (12 Dec 1998) |
| targeted drug delivery | Delivering a drug to a specific site in the body where it has the greatest effect, instead of allowing it to diffuse to various sites, where it may cause damage or trigger side effects. (14 Nov 1997) |
| fixed drug eruption | A type of drug eruption that recurs at a fixed site (or sites) following the administration of a particular drug; the lesions usually consist of intensely erythematous and purplish, sharply demarcated macules, and occasionally of herpetic vesicles; the affected areas undergo gradual involution, but flare and enlarge on readministration of the offending drug and may become hyperpigmented. Iodine eruption, an acneform or follicular eruption or granulomatous lesion caused by a reaction to systemic iodine or iodide administration. Kaposi's varicelliform eruption, a now rare complication of vaccinia superimposed on atopic dermatitis, with generalised vesicles and vesicopapules and high fever. Synonym: eczema vaccinatum. (05 Mar 2000) |
| legislation, drug | Laws concerned with manufacturing, dispensing, and marketing of drugs. (12 Dec 1998) |
| Abbe's law of limiting resolution | <physics> For a periodic structure of units separated by distance d and obliquely illuminated by the unrefracted ray and one of the two diffracted rays (extremely oblique illumination). Abbe applied the law of diffraction: d = 0.5 lambda /NA, where: lambda = wavelength of the monochromic light or shortest of mixed wavelengths NA = the limiting numerical aperture (NA) of objective or condenser. (05 Aug 1998) |