Shock loss from forehead reduction surgery and the use of minoxidil

Is it a case that the hair is going to shed anyway post surgery and should I wait until I experience hair loss before using Mixoxidil?

It is not automatically expected that you will have hair loss after forehead reduction surgery. It is a complication of this surgery and something that you should speak with your doctor about as this complication is not uncommon in women over 40. Minoxidil might help but maybe not. So a discussion with your doctor is appropriate. Forehead surgeries in women can cause hair loss and we consider that a complication of the process.