Hi twill,
As Glenn has posted, there are no specific requirements regarding the number of trials.
The amount of trials and level of validation would normally be dependent on the degree of reformulation and level of risk associated with the change.
For significant changes I would expect to see three validation/shelf life trials, for minor changes one may be acceptable if you justify and document that the change is considered to be very low risk.
Kind regards,
Tony
Thanks for your response, Tony.
It's a minor change to the formulation to remove a sweetener, so the risk should be low. That said, I am concerned about how it may affect shelf life.
Edited by twill, Today, 12:19 PM.