Phases of clinical trials.
View PDF | Print View
by: Guest
Total views: 128
Word Count: 232
|
* Phase I trials: These first studies in people evaluate how a new drug should be given (by mouth, injected into the blood, or injected into the muscle), how often, and what dose is safe. A phase I trial usually enrolls only a small number of patients, sometimes as few as a dozen. * Phase II trials: A phase II trial continues to test the safety of the drug, and begins to evaluate how well the new drug works. Phase II studies usually focus on a particular type of cancer. * Phase III trials: These studies test a new drug, a new combination of drugs, or a new surgical procedure in comparison to the current standard. A participant will usually be assigned to the standard group or the new group at random (called randomization). Phase III trials often enroll large numbers of people and may be conducted at many doctors’ offices, clinics, and cancer centers nationwide In addition, after a treatment has been approved and is being marketed, the drug’s maker may study it further in a phase IV trial. The purpose of phase IV trials is to evaluate the side effects, risks, and benefits of a drug over a longer period of time and in a larger number of people than in phase III clinical trials. Thousands of people are involved in a phase IV trial. |
About the Author
Pink is a medical practitioner by profession. I am doing research on various types of cancer. Specially my topic of interest is breast cancer. I want to spread awareness of the same disease all over the world. http://www.cancertreatmentforums.com/breast-cancer/
| previous: Career Search |
Rating: Not yet rated
Login to vote