Botox lasts 3-4 months. There will certainly be patients who in lasts longer, in that 4-6 month range, or shorter, in that 2-month range.
In general, the effects of Botox usually last four to six months after treatment. Botox also has medical uses, such as treating migraines or reducing neck spams. When used for medical purposes, it tends to work for a shorter period of time, usually lasting two to three months.
When receiving Botox Cosmetic, the location of the injection and the amount of Botox that is injected may affect how long it lasts. Other factors can affect the efficacy as well, including:
your age
the elasticity of your skin
wrinkle depth
other factors
For example, if you’re using Botox to reduce the appearance of deep wrinkles, the wrinkles will probably not completely disappear, and the effects will wear off more quickly.