Bioequivalence and Bioavailability Forum

Dear Neeraj

❝ Please let me know what is labelled dosing interval in BA/BE studies.

The one which is given in the reference product's label.
If nothing is specified in the label, ask a specialist in field about the common practice in the clinical situation.
There's no consensus how b.i.d. (bis in diem = twice a day) or 'three times a day' should be interpreted in terms of dosage intervals. Only for OAD (once a day) it's clear: tau = 24 h.
Most people would go with 12 h / 12 h for b.i.d. (morning/evening) and 6 h / 6 h / 12 h for 'three times a day' (morning/noon/evening) instead of 8 h / 8 h / 8 h (morning/afternoon/late evening).