A dose-ranging study is a clinical trial where different doses of an agent (e.g. a drug) are tested against each other to establish which dose works best and/or is least harmful.
Dose-ranging is usually a pre-clinical, phase I or early phase II clinical trial. Typically a dose ranging study will include a placebo group of subjects, and a few groups that receive different doses of the test drug. For instance, a typical dose-ranging study may include four groups: a placebo group, low-dose group, medium-dose group and a high-dose group. The maximum tolerable dose (MTD) information is necessary to be able to design such groups and therefore dose-ranging studies are usually designed after the availability of MTD information.[1]
The main goal of a dose-ranging study is to estimate the response vs. dose given, so as to analyze the efficacy and safety of the drug. Although such a response will nevertheless be available from phase III or phase IV trials, it is important to carry out dose-ranging studies in the earlier phase I or phase II stages. There are some advantages by using healthy volunteers. They are in a steady-state condition showing no different stages of disease and no variation due to disease. In addition, it is easy to recruit and select volunteers among varying age, sex, race etc. under identical conditions in which the test can be repeated. The main reasons for this is to avoid trials in the later phases using doses that are significantly different from those that will subsequently be recommended for clinical use and also to avoid the need for modification of dosing schedules at later stages where a large amount of data has already been accumulated for a different dose range.[2] The duration of action should be determined during dose-ranging study, as it will allow definition of the dosage schedule. Because it is hard to measure reliable pharmacodynamic parameter, it is difficult to determine the duration of action during early clinical trials. Other parameters instead are suggested as a tentative dosage, such as half-lives in plasma and urine in various test species and human, receptor binding in vitro, or pharmacodynamic data in vivo in animals.[3]
^Schmidt, R. (1988). "Dose-finding studies in clinical drug development". European Journal of Clinical Pharmacology. 34: 15–19. doi:10.1007/bf01061410.
January 01, 1970
dose, ranging, study, dose, ranging, study, clinical, trial, where, different, doses, agent, drug, tested, against, each, other, establish, which, dose, works, best, least, harmful, dose, ranging, usually, clinical, phase, early, phase, clinical, trial, typica. A dose ranging study is a clinical trial where different doses of an agent e g a drug are tested against each other to establish which dose works best and or is least harmful Dose ranging is usually a pre clinical phase I or early phase II clinical trial Typically a dose ranging study will include a placebo group of subjects and a few groups that receive different doses of the test drug For instance a typical dose ranging study may include four groups a placebo group low dose group medium dose group and a high dose group The maximum tolerable dose MTD information is necessary to be able to design such groups and therefore dose ranging studies are usually designed after the availability of MTD information 1 The main goal of a dose ranging study is to estimate the response vs dose given so as to analyze the efficacy and safety of the drug Although such a response will nevertheless be available from phase III or phase IV trials it is important to carry out dose ranging studies in the earlier phase I or phase II stages There are some advantages by using healthy volunteers They are in a steady state condition showing no different stages of disease and no variation due to disease In addition it is easy to recruit and select volunteers among varying age sex race etc under identical conditions in which the test can be repeated The main reasons for this is to avoid trials in the later phases using doses that are significantly different from those that will subsequently be recommended for clinical use and also to avoid the need for modification of dosing schedules at later stages where a large amount of data has already been accumulated for a different dose range 2 The duration of action should be determined during dose ranging study as it will allow definition of the dosage schedule Because it is hard to measure reliable pharmacodynamic parameter it is difficult to determine the duration of action during early clinical trials Other parameters instead are suggested as a tentative dosage such as half lives in plasma and urine in various test species and human receptor binding in vitro or pharmacodynamic data in vivo in animals 3 References edit Ting Naitee 2006 Dose Finding in Drug Development Springer Verlag ISBN 0 387 29074 5 Lee Chi Jen 2005 Clinical Trials Of Drugs And Biopharmaceuticals CRC Press ISBN 0 8493 2185 9 Schmidt R 1988 Dose finding studies in clinical drug development European Journal of Clinical Pharmacology 34 15 19 doi 10 1007 bf01061410 Retrieved from https en wikipedia org w index php title Dose ranging study amp oldid 1180942186, wikipedia, wiki, book, books, library,
