How long will 5 units of Botox take to wear off in upper forehead?

Botox typically lasts anywhere from 3-4 months.  Regardless of quantity, the duration of your results should be the same.  You want to ensure that your dosing is adequate in order to achieve the results you are looking for.  You may require additional treatment to achieve optimal results.Best of luck,Dr. Philip Solomon, Solomon Facial Plastic

Botulinum Toxin (Dysport or Botox) tends to wear off gradually beginning at 3 months and typically completely dissipated by 5 months.

Hi and thank you for your question.  5 units of Botox in an area like the forehead is not much at all.  Botox usually lasts about 3 or 4 months, but being that your injector used such a small amount, you may not have to wait as long before it starts to wear off.  Thank you,Alexander Rivkin, M.D.