(n.) Any animal, vegetable, or mineral substance used in the composition of medicines; any stuff used in dyeing or in chemical operations.
(n.) Any commodity that lies on hand, or is not salable; an article of slow sale, or in no demand.
(v. i.) To prescribe or administer drugs or medicines.
(v. t.) To affect or season with drugs or ingredients; esp., to stupefy by a narcotic drug. Also Fig.
(v. t.) To tincture with something offensive or injurious.
(v. t.) To dose to excess with, or as with, drugs.
Example Sentences:
(1) Previous use of the drug is found in more than 50 per cent of the patients, and it was often followed by a neglected side-effect.
(2) Disease stabilisation was associated with prolonged periods of comparatively high plasma levels of drug, which appeared to be determined primarily by reduced drug clearance.
(3) The significance of minor increases in the serum creatinine level must be recognized, so that modifications of drug therapy can be made and correction of possibly life-threatening electrolyte imbalances can be undertaken.
(4) We have investigated the effect of methimazole (MMI) on cell-mediated immunity and ascertained the mechanisms of immunosuppression produced by the drug.
(5) Theophylline kinetics, as an in vivo probe for the potentially toxic cytochrome P-450I pathway of drug metabolism, were studied in 11 healthy volunteers and 11 patients with calcific chronic pancreatitis at Madras, South India.
(6) However, medicines have an important part to play, and it is now generally agreed that for the very poor populations medicines should be restricted to those on an 'essential drugs list' and should be made available as cheaply as possible.
(7) The ability of azelastine to influence antigen-induced contractile responses (Schultz-Dale phenomenon) in isolated tracheal segments of the guinea-pig was investigated and compared with selected antiallergic drugs and inhibitors of arachidonic acid metabolism.
(8) The LD50 of the following metal-binding chelating drugs, EDTA, diethylenetriaminepentaacetic acid (DTPA), hydroxyethylenediaminetriacetic acid (HEDTA), cyclohexanediaminotetraacetic acid (CDTA) and triethylenetetraminehexaacetic acid (TTHA) was evaluated in terms of mortality in rats after intraperitoneal administration and was found to be in the order: CDTA greater than EDTA greater than DTPA greater than TTHA greater than HEDTA.
(9) Meanwhile the efficiency of muscarinic antagonists in inhibition of tremor reaction induced by arecoline administration is associated with interaction between the drugs and the M2-subtype.
(10) Some of those drugs are able to stimulate the macrophages, even in an aspecific way, via the gut associated lymphatic tissue (GALT), that is in connection with the bronchial associated lymphatic tissue (BALT).
(11) The 14C-aminopyrine breath test was used to measure liver function in 14 normal subjects, 16 patients with alcoholic cirrhosis, 14 alcoholics without cirrhosis, and 29 patients taking a variety of drugs.
(12) The results of the evaluation confirm that most problems seen by first level medical personnel in developing countries are simple, repetitive, and treatable at home or by a paramedical worker with a few safe, essential drugs, thus avoiding unnecessary visits to a doctor.
(13) Acquired drug resistance to INH, RMP, and EMB can be demonstrated in M. kansasii, and SMX in combination with other agents chosen on the basis of MIC determinations are effective in the treatment of disease caused by RMP-resistant M. kansasii.
(14) Further development of drug formulary concept was discussed, primarily for the drugs paid by the Health Insurance, as well as the unsatisfactory ADR reporting in Yugoslavia.
(15) Senator Bernie Sanders of Vermont, who is also seeking the Democratic presidential nomination, recently proposed a bill that would ease the financial burden of prescription drugs on elderly Americans by allowing Medicare, the national social health insurance program, to negotiate with the pharmaceutical companies to keep prices down.
(16) The authors empirically studied the self-medication hypothesis of drug abuse by examining drug effects and motivation for drug use in 494 hospitalized drug abusers.
(17) Inadequate treatment, caused by a lack of drugs and poorly trained medical attendants, is also a major problem.
(18) To investigate the relationship between Helicobacter pylori infection and nonsteroidal anti-inflammatory drug (NSAID) intolerance and the effect of gold use on the seroprevalence of H. pylori.
(19) A remarkable deterioration of prognosis with increasing age rises the question whether treatment with cytotoxic drugs should be tried in patients more than 60 years old.
(20) It was concluded that metoclopramide and dexamethasone showed an excellent antiemetic effect on acute drug-induced emesis, as well as on delayed emesis, induced by cisplatin.
Topotecan
Definition:
Example Sentences:
(1) Topotecan also induced mild depressions in the hematocrit level in the majority of courses; however, precipitous drops requiring transfusional therapy occurred in 14% of courses and suggested a drug-induced hemolytic effect.
(2) Topotecan (SK&F 104864) is a novel antitumor agent whose mechanism of action is inhibition of the DNA unwinding protein topoisomerase I.
(3) Association of topoisomerase I with this effect was confirmed in studies of Chinese hamster ovary cells previously made resistant to camptothecin (and cross-resistant to topotecan), resulting in decreased cellular content of topoisomerase I.
(4) Non-small-cell lung and platinum-refractory ovarian carcinomas should be among those evaluated in phase II trials of topotecan.
(5) A phase I and pharmacologic study was undertaken to determine the maximum-tolerated dose (MTD), describe the principal toxicities, and characterize the pharmacologic behavior of topotecan, which is a semisynthetic analog of camptothecin with broad preclinical antitumor activity and the first topoisomerase I-targeting agent to enter clinical development in the United States since studies of sodium camptothecin over 2 decades ago.
(6) Topotecan appears to be active in vitro against a variety of human tumors, including a subgroup resistant in vitro to standard antineoplastic agents.
(7) In rhabdomyosarcoma Rh12 and VRC5 colon adenocarcinoma, both of which demonstrated intermediate sensitivity to topotecan, and in osteosarcoma OS33, protracted p.o.
(8) We have shown that topotecan is partially hydrolyzed prior to administration in parenteral solutions, and that clearance of the parent compound proceeds in vivo by conversion to hydroxy acid and elimination.
(9) For animals receiving a single sequential treatment with DAC and topotecan, the median time until the mean tumor size reached 20 mm was 38 days, and for the group with multiple sequential combination treatments the time was 51 days.
(10) Further clinical development of topotecan is warranted.
(11) The reduced cytotoxicity of topotecan in KB V1 cells was due to the overexpression of MDR1 in KB V1 cells since verapamil restored both topotecan accumulation and cytotoxicity.
(12) Topotecan (TPT, 9-dimethylaminomethyl-10-hydroxycamptothecin) is the first topoisomerase I-directed cytotoxic agent to enter clinical trials in the United States in two decades.
(13) In this phase I clinical and pharmacological trial, topotecan was given as a bolus intravenous (i.v.)
(14) Topotecan demonstrated significant activity against all three osteosarcoma xenografts examined, with optimal schedules causing complete regression in two lines.
(15) A soft-agar cloning system assay was used to determine the in vitro effects of topotecan against cells from biopsy specimens of colorectal, breast, lung, ovarian, renal cell, and gastric cancers and cancers of unknown primary origin.
(16) We have evaluated the interaction between 2'-deoxy-5-azacytidine (DAC) and 9-dimethylaminomethyl-10-hydroxycamptothecin (topotecan) based on our hypothesis that DAC, through DNA hypomethylation, might increase the transcription of topoisomerase I (topo I) leading to increased sensitivity to topotecan.
(17) In addition, some of the tumor specimens resistant to cyclophosphamide and etoposide were also sensitive to topotecan.
(18) CPT-11 and Topotecan are a new semisynthetic derivative of CPT, and have been shown to inhibit DNA topoisomerase I and to have a strong antitumor activity with low toxicity against murine tumor.
(19) In view of the profound biochemical effects of camptothecin and its analogues on DNA replication and the differential cytotoxic effects on human tumors in xenografts, experiments were performed to determine whether topotecan, a camptothecin analogue, would potentiate the radiation effects on human carcinoma cells in culture and murine fibrosarcoma in mice.
(20) The article focuses on tubulin poisons such as taxol, topoisomerase inhibitors, such as topotecan, and drugs such as bryostatin 1 and miltefosin, which interfere with specific signal transduction pathways involved in malignant cell growth.