Can It Take Longer for Botox to Work in Certain Places in Your Forehead?

Dear teetee9,  Everyone starts with asymmetric eyebrow position and movement.  Even with ideal injections, it's common for one brow to move more that the other.  usually you will see the maximal effect by 2 weeks.  at that point you can return to your doctor to evaluate the movement and symmetry and you might need a tiny dose to relax the remaining moving muscle.   No need to worry.  Best of luck

Yes, it can take longer for the full effects of Botox to kick in to all affected muscles. It can take up to 7-10 days to see full results. While this can be frustrating when you have a muscle that still moves vs. one that doesn't, getting injections in that area too soon could potentially lead to over-injection in that area which could cause ptosis or drooping. So wait until the full 7-10 days have passed and if you still have movement you weren't expecting, see your injector for an assessment and possible touch-up in that area.

"This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."