Drooping Eyebrow After Botox

So, the good news is that Botox is NOT permanent and although the full effects of Botox typically last 3-4 months, muscles that are inadvertently affected (as in your case) typically receive less of a dose and I predict your brow will likely return sooner to its pre-injection state...The key is what do now…A droopy eye-BROW from Botox can sometimes be improved with Botox injected into the outside part of the eye (the lateral aspect of the orbicularis oculi muscle) to generate a bit of a brow lift in that area – by paralyzing the orbicularis muscle that normally acts to depress the brow, you may get a slight compensatory brow lift with Botox to that area.  In the future, be sure to seek the services of an experienced physician injector. I think the key with Botox lies in truly understanding the anatomy of the injected area, and more importantly the variability in the anatomy between patients -- for brows, the forehead, and anywhere else you plan on receiving a Botox injection. This includes having a firm understanding of the origin, insertion, and action of each muscle that will be injected, the thickness of each muscle targeted, and the patient variability therein. As an aesthetic-trained plastic surgeon, I am intrinsically biased since I operate in the area for browlifts and facelifts, and have a unique perspective to the muscle anatomy since I commonly dissect under the skin and see the actual muscles themselves. For me, this helps guide where to inject and where not to. However, with that said, I know many Dermatologists who know the anatomy well despite not operating in that area, and get great results.Good luck.

One of the risks of botox treatment is that muscles other than those targeted can be affected by the treatment. That risk is less likely when your treatment is performed by an experienced doctor. Botox treatment's effects are temporary. Because non-targeted muscles do not receive the full dose of your botox treatment, the effects in non-targeted muscles typically resolve well before the effects in targeted muscles. There is no way to immediately reverse the effects of botox. In some cases, unintended asymmetry may be amenable to improvement by performing a touch up treatment on the other side. Always discuss your concerns with your doctor. Good luck.

Notify your doctor but do nothing for two weeks.
I have seen Botox over correct for the first two weeks and settle down after that.
If after two weeks your eyebrow still droops there are a few options:

If your eyelid is also drooping, there are eye drops (one is alphagan) which can stimulate the eyelid to elevate but this will not effect the eyebrow.
If your eyebrow still droops, injection of Botox below the tail of the eyebrow may ease the depressor effects for the orbicularis oculi
Alternatively, you may choose to lower the opposite eyebrow to make them more even.