If brow botox, how long does it last?

3-5 months. At the beginning, the average is about 4 months. With repeat injections (over 2 years or so) that often lengthens to about 6 months. If the dose was not strong enough, it may wear off sooner.
Usually 4 months. Depending on the specific location of injection and the amount (units) injected per site, you can have an effect lasting about 4 months. The experience of your doctor in injecting proper muscles make a difference in the result and to avoid unwanted droop in different area of the eyelids an eyebrows.
3-6 months. Most people find that Botox lasts 3-4 months, but on average have it repeated every 3-6 months.
4-6 months. Typically 4 months initially, but as long as 6 months after repeated injections.
Few months. Botox cosmetic is a great option to reduce facial wrinkles. Botox has also been used to lift the eyebrow, called the "Botox brow lift". Results are temporary and last several months. Plastic surgery with a brow lift, however, is generally the preferred option for lasting results.
Typically 3-5 months. Botox typically lasts about 3-5 mo this depending on the activity and amount used.
3-4 Months. Botox injected into facial muscles usually lasts 3 to 4 months in most people.
3 months. With usual dosing, most patients will have a lasting benefit for about there months from Botox or Dysport injections.