Botox has a variable duration of action in different people

Botox has a variable duration of action in different people. The average duration of action is about 3-4 months, however, it can last up to six months especially in the forehead  area and the region between the eyes. In some areas such as arround the crows feet of the eyes typically three to four months is maximum duration in most individuals. Botox is very patient dependent and two different folks injected in the same site can have both a different onset (time to take effect) as well as duration of action.