What is BA BE studies in clinical trials?
The objective of BA/BE studies in clinical trials is to evaluate the rate and extent of absorption of a drug from a test formulation. Bioequivalence and bioavailability studies are essential in early (Pilot Bioequivalence) and late (Pivotal Bioequivalence) clinical development of drug candidates.
How are bioequivalence studies conducted?
Bioequivalence studies can be conducted in a non-replicated or replicated fashion. The standard two-period, two-formulation, two-sequence crossover study uses a non-replicated design. In terms of statistical analysis criteria, therefore, an average bioequivalence approach is generally sufficient.
What is difference between BA and BE studies?
Bioavailability studies focus on determining the process and time frame by which a drug substance is released from the oral dosage form and moves to the site of action. On the other hand, bioequivalence studies focus on the performance of the drug product and usually involve comparisons of two drug products: T and R.
What is washout period in bioequivalence study?
The time interval between the two treatments is called “washout period.” Washout period is required for the elimination of the administered dose of a drug so as to avoid the carryover. For most of drugs in crossover design, at least 10 half-lives should be allowed between treatments.
What is bioequivalence study PPT?
Bioequivalence :- It is a relative term which denotes that the drug substance in two or more identical dosage forms, reaches the systemic circulation at the same relative rate and to the same relative extent i.e. their plasma concentration-time profiles will be identical without significant statistical differences.
What are the two types of bioavailability?
Types of bioavailability are as follow:
- Absolute Bioavailability: When the drug is administered through the intravenous route, the bioavailability of the drug achieved will be 100 percent.
- Relative Bioavailability: It is the bioavailability of the drug when obtained and it is compared with a reference standard.
What is the difference between bioavailability and bioequivalence studies?
For a drug to be highly bioavailable it should be fast and completely absorbable. Bioequivalence is Just a comparison of the bioavailability of two identical products. For example, we compare two brands of paracetamol (Acetaminophen) for their bioavailability.
What is Tmax Cmax and AUC?
Abstract. The three classical pharmacokinetic parameters used to assess bioequivalence, AUC (total area from zero to infinity), Cmax (peak plasma concentration), and tmax (time to reach Cmax), are suitable to determine the extent and rate of absorption of immediate-release drug products.
What is AUC drug?
Description. The area under the plasma drug concentration-time curve (AUC) reflects the actual body exposure to drug after administration of a dose of the drug and is expressed in mg*h/L. This area under the curve is dependant on the rate of elimination of the drug from the body and the dose administered.
What is PK profile?
A PK profile is generally the result of four key physiological events: absorption, distribution, metabolism, and excretion, typically referred to as ADME.
What is the maintenance of records of Ba/Be studies?
MAINTENANCE OF RECORDS OF BA/BE STUDIES All records of in vivo or in vitro tests conducted on any marketed batch of a drug product to assure that the product meets a bioequivalence requirement shall be maintained by the Sponsor for at least 2 years after the expiration date of the batch and submitted to CDSCO on request. 8.
What are the precautions to be taken during the study?
Unless the study design requires, subjects should abstain from smoking, drinking alcohol, coffee, tea, xanthine containing foods and beverages and fruit juices during the study and at least 48 hours before its commencement. 1. Selection of Blood Sampling Points/Schedules
What is the conventional acceptance range for pharmacokinetic studies and bioequivalence?
The conventional acceptance range as applicable to pharmacokinetic studies and bioequivalence is not appropriate (too large) in most cases. This range should therefore be defined in the protocol on a case-to-case basis. 4.3 Comparative Clinical Studies
What is the study phase of a biological sample?
Study Phase: In general, with acceptable variability as defined by validation data, the analysis of biological sample can be done by single determination without a need for a duplicate or replicate analysis. The need for duplicate analysis should be assessed on a case-by-case basis.