· 2 min read · By Clinical Trials
Running BA/BE Studies in India: A CRO Operations Guide
What actually happens between protocol award and database lock in an Indian bioequivalence study — screening logistics, dosing-day choreography and the documentation regulators expect.
Bioavailability and bioequivalence (BA/BE) studies look simple on paper: dose healthy volunteers, draw blood, compare curves. In practice, a two-period crossover study with 24 volunteers is one of the most operationally dense exercises in clinical research, and most delays come from logistics rather than science.
Screening is a numbers game
For every volunteer who doses, expect to screen three to five. Consent, medical history, vitals, ECG, laboratory panels and eligibility review each remove candidates. The CROs that hit enrolment targets are the ones that treat screening as a pipeline: pre-screening by phone against the protocol's inclusion and exclusion criteria before a volunteer ever travels to the site saves days and reduces screen-fail costs.
A verified volunteer database changes the arithmetic further. When age, BMI, washout status and prior participation are confirmed before the visit, screen-fail rates fall and the screening day runs on schedule.
Dosing day is choreography
On dosing day, everything is timed to the minute: check-in, eligibility reconfirmation, fasting verification, dosing, and then the pharmacokinetic sampling schedule. A 24-sample PK schedule leaves no room for drift — a five-minute deviation on an early time point can matter for Cmax. The sites that run clean dosing days rehearse the schedule, assign named staff to each time point, and log deviations in real time rather than reconstructing them afterwards.
Documentation is the product
The data are only half the deliverable. Ethics committee approvals, informed consent forms, source documents, sample chain-of-custody and deviation logs are what CDSCO and international regulators actually inspect. Every record should be attributable, legible, contemporaneous, original and accurate — the ALCOA principles are not a slogan, they are what an auditor checks first.
The washout discipline
Between periods and between studies, the washout period protects both the volunteer and the data. Cross-checking a volunteer's last dosing date against a shared pass record — rather than relying on self-reporting alone — is the single most effective control against duplicate participation, and it is increasingly what sponsors ask about during capability assessments.