Do Botox brow lifts lead to droopy eyelid in the long term?

Everything sags over time, but in your case, Botox/Xeomin will not be the cause.  if you are only injecting the crows feet and not the forehead, there is no reason to believe there will be any effect to the frontalis muscles that lift the forehead.  Theoretically, if you keep muscles paralyzed, they will atrophy.  But to measure and document this is almost impossible because neurotoxin's onset and duration is different in every patient and the forehead naturally drops with age, but differently in every patient.  3D imaging of patients with neurotoxin injected into one side of the forehead only and followed for thirty or forty years might give us an answer, but you wont find any volunteers.  The important thing is to enjoy life, and look your best now, as if there is no tomorrow.

As we age, our eyelids naturally sag and droop. A combination approach would be best to see visible improvement. In terms of non-surgical treatment options, I would recommend a Chemical Brow Lift (using Botox, Dysport, Xeomin, or Jeuveau) and filler injections to rejuvenate the temples, eyebrow, eyelid, eye troughs, upper eye hollows, and forehead. I typically combine this with Ultherapy and thread lifting to lift the brow; RF and skin tightening laser treatments to stimulate collagen production and rejuvenate the skin; and laser or superficial RF devices for improvements in texture, color, and any crepey skin around the eyes as needed. In some cases, surgery is the best solution to achieve the desired results. See an expert for a formal consultation. Best, Dr. Emer.​

Botox injected for the crow's feet will not cause your eyes to sag in the long term. While we can't stop the aging process, Botox does allow us to help patients achieve a more youthful appearance without surgery.